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iBooks 1.1.2 by Apple
iAnnotate PDF 1.2 by Aji Ltd
iRead PDF 1.1.2 by Aji Ltd
GoodReader 2.8.4 by Yuri Selukoff
CloudReaders 1.14 by Satoshi Nakajima
PDF Expert 1.0.0 by Readdle
readMe 1.8 by Mojo LLC
MyPDFs 1.2.4 by Julius Oklamcak
PDF Reader Pro Edition 2.0.1 by iTech
PDF Reader 1.2 by Kdan Mobile Software LTD
TagDisk HD + 1.0.0 by Weng Chen-chin
PDF Reader for iPad 1.1 by Eduard Clapkis
PDF Juggler 1.1.1 by Arentz Consulting
Quick PDF+ 1.32 by JI Software Company
Folio 1.2 by Prografon
SmileyDocs 1.6 by Daniel Borsuk
Simple PDF Viewer 1.1 by Red Cone Development
iPDF 1.5 free by Fubii
PDF Comrade 0.1 by iMobilco
SimplyPDF 1.3 by Don Miller / eNATAL LLC
Bookman 1.3 by Takashi Kato
Documents 2 4.0by Savy Soda
Stanza 3.0.3 by Lexcycle
PDF Word Excel File Viewer 1.0.12 by Concrete Software
Mobile Studio 1.7.0 by Matt Stoker / Pixio
ReadPDF Pro 1.0 by Safeer Jiwan
FastPDF 1.2 by MobFarm
ReadDemon 1.1 by DeadNick LLC
ReaddleDocs 1.5.1 by Igor Zhadanov
PDFReader 2.1 by YUYAO
PDF HD 1.0.0 by Igor Zhadanov
BookShelf 2.2.3 by HPC Technologies
FileApp by DigiDNA.
Easy PDF 1.1 by WildPalm Ltd.
Endless PDF Reader 1.0 by realazy
iPDFViewer 1.1 by Tatvasoft
Documents to Go Premium - Office Suite 3.3.1
App:iBooks 1.1.2 by Apple iAnnotate PDF 1.3 by Aji LtdiRead PDF 1.1.3 by Aji LtdGoodReader 3.0.2 by Yuri SelukoffPDF Expert 1.0.0 by ReaddleCloudReaders 1.14 by Satoshi NakajimareadMe 1.8 by Mojo LLCMyPDFs 1.2.4 by Julius OklamcakPDF Reader Pro Edition 2.0.1 by iTechPDF Reader 1.2 by Kdan Mobile Software LTDTagDisk HD + 1.0.0 by Weng Chen-chinPDF Reader for iPad 1.1 by Eduard ClapkisPDF Juggler 1.1.1 by Arentz ConsultingQuick PDF+ 1.32 by JI Software CompanyFolio 1.2 by PrografonSmileyDocs 1.7 by Daniel BorsukSimple PDF Viewer 1.1 by Red Cone DevelopmentiPDF 1.5 free by FubiiPDF Comrade 0.1 by iMobilcoSimplyPDF 1.3 by Don Miller / eNATAL LLCBookman 2.1 by Takashi KatoDocuments 2 4.0by Savy SodaStanza 3.0.3 by LexcyclePDF Word Excel File Viewer 1.0.12 by Concrete SoftwareMobile Studio 1.7.0 by Matt Stoker / PixioReadPDF Pro 1.0 by Safeer Jiwan FastPDF 1.2 by MobFarmReadDemon 1.1 by DeadNick LLCReaddleDocs 1.6.1 by Igor ZhadanovPDFReader 2.1 by YUYAOPDF HD 1.0.0 by Igor ZhadanovBookShelf 2.2.3 by HPC TechnologiesFileApp by DigiDNA.Easy PDF 1.1 by WildPalm Ltd.Endless PDF Reader 1.0 by realazyiPDFViewer 1.1 by TatvasoftDocuments to Go Premium – Office Suite 3.3.1
Universal? If not, price of iPhone version (if exists)+ (with iOS4+ on iPhone / iPod Touch)- / -- / -- / $1- / $5- / -+- / -- / $2-- / -- / -- / -- / -- / -- / -- / -- / $4- / -- / -- / -++++- / -+- / $5- / $5+- / -++- / -- / -++
VGA output? Test: iPad / iPhone4-- / n/a- / n/a+ / + (automatic; XGA. On the iPhone the text is low-resolution like being rendered iwth scaling = 1)n/t+ (automatic; XGA; only one page is shown in Landscape two=page mode, unlike with Goodreader, which shows both)-- n/t (crashes under 4.2b2)? n/t (couldn't bother with a title that doesn't even have file share support...)n/t-- - - - n/t (couldn't bother with transferring files)--- - - n/t (no file sharing = not bothering)n/t (no file sharing = not bothering)- - ????+ (in both viewing modes: UIWebView and Quartz. Full page only in the latter; scrollable in the former. XGA, automatic.) + (manual – see the rightmost icon at the bottom in title directory view; excellent: can select all the available resolutions [now: VGA, SVGA and XGA] from the menu. Even shows the GUI, not only the contents of the PDF files.) / - (not even an icon!) --- -???- -
Last updatedJul 23, 2010Oct 01, 2010Sep 4, 2010Oct 5, 2010Oct 1, 2010Aug 11, 2010Jul 21, 2010Jul 01, 2010Jun 08, 2010Jul 13, 2010Aug 05, 2010Jul 12, 2010Jun 18, 2010Jul 20, 2010Jul 23, 20102 Oct 2010Aug 05, 2010Apr 15, 2010May 28, 20105-Jul-1005 Oct, 2010Jul 19, 2010Jun 26, 2010Aug 10, 2010Jul 15, 2010Jun 12, 2010Jun 08, 2010Apr 22, 2010Sep 27, 2010May 26, 2010Jun 17, 201010-Jul-10Jun 21, 201001 July 2010Jul 22, 201005 August 2010Jun 25, 2010
Pricefree10free$1.00. The iPad version has all the down/uploader modules (e.g., FTP). They need to be purchased separately for the iPhone version ($1 each; in-app purchase). The iPad version is stated to made more expensive ($3) in the near future.$5free2141$6; free version (TagDisk HD) displays ads; there doesn’t seem to be any other difference11$1 (there’s a free lite version without “Jump to page” functionality; otherwise, it’s equally bad and non-recommended)Free (with in-app purchase [$1], you can get the full version, which allows for any number of books [the free version only allows for ten] simultaneously stored on the iPad.)11freefree$2 free$2; also has a lite version (2.0, last update: 12/05/2009 and only compatible with the iPhone)free12$2 (in-app purchase); lite version is restricted to 3 files only and lacks quick repositioning355135free (the Pro version costs $5)freefreefree$15
Current version rating4.5 / 17414 / 563 / 3034 / 8n/e3 / 323.5 / 53 / 273.5 / 4414 / 2501.5 / 54 / 52 (dev is cheating – check out the Remark row!)n/en/en/en/en/e2 / 14853.5 / 1852.5 / 82.5 / 1083 / 123.5 / 28464 / 143 / 171.5 / 2433.5 / 1932.5 / 893.5 / 993.5 / 4893 / 322.5 / 952.5 / 429n/e2.5 / 34n/e3 / 486
All version rating4.5 / 134703.5 / 902n/a4.5 / 9110n/a3.5 / 17423 / 1342.5 / 2253 / 14173.5/ 10422 / 744 / 156n/a3 / 292.5 / 36n/e (?)2.5 / 222 / 2628n/a2.5 / 1722.5 / 3402.5 / 11813 / 844272.5 / 6323 / 1170n/a3.5 / 2592.5 / 1013.5 / 6083 / 2540n/a3 / 6572.5 / 9508n/an/an/a3.5 / 2299
Search:+ with page / hit list+ (remembers last entry; requires one-time pre-processing)+ (see iAnnotate)+, with history+---+ with page / hit list-----++ with hit list; major problem: doesn’t highlight the hits!----+-+ (with a list of hits. With unofficial / your own PDF files, it doesn't highlight hits; with ones downloaded from it, it does.)-----+-++- - - - -
- Next- (use hit list)+++ (Up / Down / Stop icons displayed)- (list of hits is perfectly usable)n/an/an/a- (hit list is perfectly usable tho)n/an/an/an/an/a+- (use hit list)n/an/an/an/a- (albeit it presents a list of hits)n/a+ (both the on-screen hit list and .../Next)n/an/an/an/an/a+n/a-; however, a list with the number of occurrences on each page presented-n/an/an/an/an/a
- Previous- (use hit list)+++- (list of hits is perfectly usable)n/an/an/a- (hit list is perfectly usable tho)n/an/an/an/an/a-- (use hit list)n/an/an/an/a- (see above)n/a+ (the on-screen hit list only – no dedicated Previous)n/an/an/an/an/a+n/a(see above)-n/an/an/an/an/a
- General search speedSlowinstanteousinstanteousacceptableAcceptablen/an/an/apretty fastn/an/an/an/an/aacceptable (faster than iBook)pretty fastn/an/an/an/aAcceptablen/an/an/an/an/an/aQuite slown/aaverageinstanteous (after all, everything is stored as plain text files)n/an/an/an/an/a
- Able to find separated words?+--+ ??n/an/an/a+n/an/an/an/an/a++n/an/an/an/a- (!)n/an/an/an/an/an/a+n/a++n/an/an/an/an/a
Automatic / configurable page cropping:---+---- (three-fingered single taps don’t crop, just fit the page in the available screen estate)-------+---Able to follow separate text columns when available-------Automatic (instead of non-existent zooming); works very well---n/a (textual only)-----
Odd and even pages differentlyn/an/an/a+n/an/an/an/an/an/an/an/an/an/an/an/tn/an/an/a-n/an/an/an/an/an/an/an/a (automatic, can't manually set up)n/an/an/an/an/an/an/an/an/a
Remembers separate settings for different books?n/an/an/a+, even via restartsn/an/an/an/an/an/an/an/an/an/an/a+n/an/an/a-n/an/an/an/an/an/an/an/an/an/an/an/an/an/an/an/an/a
Scrolling: Quick scroll+ (horizontal scrollbar at bottom with mini page thumbnails – pretty cool and the thumbnails are generated quickly and are cached in the file system)--+ (vertical scrollbar on left)+ (scrollbar at the bottom)+ (horizontal scrollbar at bottom)+ (horizontal scrollbar at bottom)+ (horizontal scrollbar at bottom)+ (vertical scrollbar on the right)----+ (horizontal scrollbar at bottom)+ (horizontal scrollbar at bottom)+ (horizontal scrollbar at bottom)--+ (horizontal scrollbar at bottom)+ (via the scrollbar at the bottom)+ (via the scrollbar at the bottom)- (not even to the beginning by tapping the status bar)+ (scrollbar at bottom)-+ (thumb must be enabled manually)+ (slider under top right page number button; enabled in Pro version only)+ (slider at the bottom)+ (slider at the bottom)+ (knob on the right)-+ (scrollbar at bottom with page number)n/a (textual only)+ (scrollbar always visible on the right)+ (scrollbar accessible via the topmost book icon on the right)+ (scrollbar on the right)- (no scrollbar at all; you can only scroll via the dedicated icons and the Jump to page dialog)+ (only in Thumbnail view; pretty slow compared to mos other apps with quickly draggable scrollbars)
Direct page number entering- (scrollbar perfectly usable tho and positioning very fast, as opposed to iAnnotate / iRead PDF)+ (at a pretty illogical location: tap on the current tab / Navigate / Go to page; requires a lot of taps to go to, say, the first page compared to titles with always-on mini thumbnails or page slider)+ (see iAnnotate)+ (icon with # on it)+- (scrollbar perfectly usable tho)-- (scrollbar perfectly usable tho)+ (icon in the upper right corner)+ (right menu / Jump to page)---+ (top right, “Page” button)- (scrollbar perfectly usable tho)- (scrollbar perfectly usable tho)--+ (dedicated button in the top right)- (scrollbar perfectly usable tho)- (scrollbar perfectly usable tho)-- (scrollbar perfectly usable tho)+ (“Jump” icon at the center bottom)- (and thumb doesn't display page number)- (page number is displayed with slider, though)- (slider displays page number)- (slider displays page number)- (no problem though – scrollbar also displays page numbers)+ (right menu / Jump to page)--- (scrollbar works OK with the current page displayed at the top, though)- (scrollbar works OK, though)- (however, scrolling around makes it pretty easy to see the current page number)++ (2nd / center icon; also, under the same icon, separate icons for jumping to the beginning / end)
Scrolling must be done by…Left / right tap zones or swipingSwiping up/down or dedicated arrow icons in non-fullscreen mode; touch fields (left/right edge) added in 1.12 + (see iAnnotate)Left/right tap or swipeTap zones (or slight left/right swipes)Left/right tap or swipe gestureUp/down tap zones (can be reconfigured to use left/right instead) + up/down draggingLeft / right tap zones (and also arrows in the bottom left/right corners)Page dragging or icons on the upper taskbar + tap zones, can be enabled in SettingsUp/down swipes / tap areas to swap pagesUp/down draggingUp/down draggingLeft/right swipingLeft/right swipingLeft/right swiping and tap areasLeft/right swiping (in default Quartz 2D mode; if you switch to Safari mode, then, continuous up/down dragging [and you lose all the additional goodies like outline or highlights]) in non-zoomed-in state; with zoomed in, only the non-fullscreen arrow buttons in the lower left/right cornersUp/down draggingUp/down drag or icons in the upper leftLeft/right tapFour tap areas at the bottom/top left/right. When in Landscape, you'll need the bottom right to scroll down the current one (and to the top of the next page on the following tap)Configurable tap areas – three pre-set available in SettingsUp/down gestures – no tab areasLeft/right taps or swipes. Only works when not zoomed in at all – that is, you must zoom out to be able to scroll. This is a big pain in the back)Up/ down swipes or, in non-fullscreen mode, the up/down icons in the bottom leftup/down swipe only (no touch areas)Left/right touch zonesLeft/right touch zones + swiping gesturesLeft/right touch zonesUp / down swipe or tap zonesUp/down swipes / tap areas to swap pagesleft/right tap / swipetap zones, dragging or auto-scrollingdragging the entire page or the icons in the bottom bar in non-fullscreen modeSwiping (no tap zones)Dragging entire pages or tap zones on the left/right dedicated fwd/backward icons , not any kind of drag/tap zone supportVery poor – via icons only, not any kind of gesture / tap zone-based page switching (only drag-based scrolling when zooming in)
Lockable vertical / horizontal position when scrolling horizontally / vertically with gestures (as opposed to taps)-+ (last icon in the bottom toolbar)+ (see iAnnotate)+ (the last-but-one icon on the right in article view; inactive when not zoomed in. It’s active only when you have vertical swipe activated. It is automatically disabled when you select horizontal swiping and/or double page layout, because it doesn't make much sense under these conditions.)Not needed: upon vertical scrolling, the horizontal position is pretty much locked)-n/a (not any way to zoom in)-+ (“Lock” button)Vertical scrolling; lockable horizontal position in the right menu. (Setting not remembered over restarts.)+ (doesn’t need to be enabled; it’s in effect all the time. It doesn’t disable panning the page, though – excellent!)-n/a (no zoom)----+ (doesn’t need to be enabled; it’s in effect all the time. It doesn’t disable panning the page, though – excellent!)-n/a (no manual drag-based scrolling at all, only an automatic one)- --+ (doesn’t need to be enabled; it’s in effect all the time. It doesn’t disable panning the page, though – excellent!)+ (doesn’t need to be enabled; it’s in effect all the time. It doesn’t disable panning the page, though – excellent!)n/a (no way to zoom in)-n/a (no zooming possible)+ (doesn’t need to be enabled; it’s in effect all the time. It doesn’t disable panning the page, though – excellent!)Vertical scrolling; lockable horizontal position in the right menu. (Setting not remembered over restarts.)-n/a (textual only)auto-locks, works pretty wellno need (if you do zoom in and, then, scroll up and down in the same page, the horizontal position, which only depends on the zoom level, will be maintained)- (no need for it, though - it stays set and won't bounce)-- (not a problem though as you can't really zoom into the text)
Possible to scroll zoomed in in the same page by taps (to avoid vertical / horizontal mismatch?)- (no tap zones for in-page scrolling - only dragging works there)- (swiping only)- (swiping only)+, works as expected (one tap to go to the bottom, next tap to the top of the next page etc. – in the non-default vertical swipe mode. With the default Horizontal Swipe mode, the tap at the bottom to switch page doesn’t work – you need to tap on the right. It, however, will take you to the left side of the next page, meaning you’ll still end up having to manually [with swipe gestures] scroll right)+ (tap zones at the top / bottom, works as in the desktop reader, excellent)- (no up/down tap, only to move to the prev/next page)n/a (not any way to zoom in)- (no up/down taps)- (while the app supports tap zones, it still doesn’t support going down to the bottom of the page)+ (albeit you won’t see anything you’ve been reading)- (no tap zones)- (no tap zones)n/a (no zoom)- (no tap support)- (no up/down taps, only for page changing)- (no up/down taps)- (no tap zones)--n/a (no manual drag-based scrolling at all, only an automatic one, even inside a page when in Landscape)- - (can only scroll by swiping)- (only swiping works)Only in non-fullscreen mode, using the up/down icons in the bottom left. (No tap areas.)- (only swiping works)n/a (no way to zoom in)- (touch points are left/right only)n/a (upon using the auto-crop zoom where vertical scroll may be needed, as the horizontal size of the page is the same as that of the screen, no drifting is possible. Scrolling can only be done via up/down swiping.)+ (works as desktop PDF readers – excellent) in Quartz mode; simple dragging only in UIWebView mode + (albeit you won’t see anything you’ve been reading)- (you must swipe [with two fingers] to scroll inside a page)n/a (textual only)- (no tap-based scrolling)n/a (no taps supported; however, dragging works just OK)+ (when zoomed in, tap zones work as expected)- (no tap support, can only drag when zoomed in)- (dragging only)
Continuous scrolling (possible to see the bottom of previous page / the top of the next one) purely with taps, without dragging?-+ (default and only mode)+ (default and only mode)- / pairs of pages only visible in Landscape mode, fully zoomed out (that is, full pages are visible); adjacent pages can only be seen if you keep switching between “Double Pages” and “Double Pages With Front Cover” modes (the latter increases page indexes by one). When switching to Horizontal scrolling mode (in file list, Settings / Viewing PDF Files / Horizontal Swipe, in “Single page” mode, not possible to display two pages at the same time without manually positioning in between the pages)-- / adjacent pages only visible in Landscape mode, fully zoomed out (that is, full pages are visible)-; however, you can explicitly tell the app the percentage of overlapping (see Settings / Tap Zone / Lines Visible From Previous Page)-+ (default and only scrolling mode)+ (default – and only – mode)+ (default and only scrolling mode)+ (default and only scrolling mode)---- (only if you switch to Safari rendering mode and also lose almost all the additional goodies: outline etc.)+ (default and only scrolling mode)+ (default and only scrolling mode)- (can’t even display adjacent [or two] pages in Landscape)+ (see the four tap zones)- (Quartz2D page swapping)+ (there isn’t a way NOT to scroll in this mode)- (in Landscape, only one page is displayed, too)+ (default and only scrolling mode)+ (default and only scrolling mode)- / - (only one page is displayed at a time, in Landscape too, when the list of loaded books is displayed in the remaining screen estate)- / + in Landscape mode (zoomed out). There, you can switch between even and odd pages with the second icon; this means you can always display any two pages side by side you want to see-- in the default "Readdle PDF Expert" mode, + in the (otherwise, pretty feature-less) "iPhoneOS Viewer" (UIWebView) mode. (Switch between the two in Settings / Viewers / View PDF in)+ (default – and only – mode)-n/a (textual only)+-+--
Sending: Send by mail?-++++---++-------+----+ (also can be shared via Facebook and Twitter)-+-+-+++ (from frontpage icon-based view, rightmost icon; not visible in traditional Details list view)-+---+
„Open in” source?-+ (tap on current tab / Share … / Open in… Note that it doesn’t transfer annotations / bookmarks - you must use the desktop iTunes to transfer them)+ (tap on current tab / Share … / Open in… Note that it doesn’t transfer annotations / bookmarks - you must use the desktop iTunes to transfer them)+ (from the file list view, Manage Files / select the file / Open In... at the bottom center)+-------------------- (In File List, the double arrow / Open In only refers to built-in viewer types)---+ (arrow icon, Open in...)-+ (from frontpage view, rightmost icon)-----+ (via Details page – see icon „i”)
Receiving files: Registers itself as PDF reader for „Open in”? (Note: 10 entries will be displayed at most!)++++++++++--++-+---+ +-+ (note that, unlike in pre-3.0.3 versions, it no longer messes up Mail's ability to pass the PDF file to any other PDF reader)--++-+-++ (albeit it won't be able to handle it natively and just crashes upon trying to open in text mode; that is, it's pretty meaningless to )+++-+
iTunes File Sharing support- (can be, of course, synched in the Books tab of iTunes – of course, this isn’t as fast as File Sharing because it requires a full synchronization cycle, as opposed to the instant file transfer of File Sharing not necessiating any explicit synchronization)+++++++++--+++++-++++++-++++++-+++- (!)+
Built-in Wi-Fi server: HTTP---++++-++----- (FTP only)- (FTP only)-----+ (in addition to HTTP, it also supports FTP. However, in my tests, I wasn’t able to access the latter – flaky implementation?)-++-+-++--+----
Direct download from Web?-+ (built-in Web browser)+ (built-in Web browser)+ (Web Downloads in the file list: direct URL + built-in Web browser)--+ (has a Web server)-+ (built-in Web browser)+ (with a Web browser & download manager)+ (both direct URL and built-in Web browser with download manager, with resuming support. Note that the easiest way of downloading is letting the system render the PDF file and, then, tapping the “down” arrow from inside. You can also tap-and-hold PDF links, select “Copy” from the context menu and, then, switch to the “Downloads” tab, select Enter URL and paste the URL there)+ (the only way to access PDF files)--+ (no Web browser though – only direct URL)- (promised for future versions)--+ (Web browser built-in with download capabilities)----+ (web browser built-in)--+ (second icon in list view; it even has a built-in Web browser. The latter also has local favorite support.)-+ (Web browser built-in [Browser from the main menu on the left])+ (with a Web browser & download manager)-+---+ (no built-in Web browser though - need to directly enter the URL of the PDF)-
Direct access of POP3 / IMAP mailboxes to search for documents?---+ (with some even pre-configured: Gmail, (paid) Yahoo, Me.com, Hotmail, AOL)------------------------+ ([Attachments / Add]; preconfigured: Gmail, (paid) Yahoo, Me.com, Hotmail, AOL)--------
FTP client?---+ (tested with ftp://ftp.funet.fi/ resources; don’t forget to enter something (e.g. ‘anon’) with anon FTP sites) ------------------------+--------
DropBox-+ (starting with 1.2)+ (see iAnnotate)+------------------------+--+----+
Others?---WebDAV, Google Docs, box.net, FilesAnywhere.com, MyDisk.seWebDAV---Can use the image library to import images from & convert them into PDFCan import photos (e.g., of text pages) from the photo library and assemble them into a PDF file, which, then, can even be moved back to the desktop. Excellent and unique!----FTP server; in my tests, it worked just fineFTP server; in my tests, it worked just fine----FTP server (Settings / FTP in Library view)Google Docs--Send via Bluetooth (to the same app; of course, not OBEX) didn’t work between my iOS4 3GS and iPad, neither jailbroken---WebDAV, Google Docs, box.net, FilesAnywhere.com, MyDisk.se and Readdle’s own 512M storage!!!! Can import photos (e.g., of text pages) from the photo library and assemble them into a PDF file, which, then, can even be moved back to the desktop. Excellent and unique!------Google Docs, SugarSync, Box.net
Library handling: Folder support (to help separate titles)-+ (starting with 1.3; excellent drag-and-drop support; unique subfolder support)-+ (in the GUI: Manage Files / New Folder; then, select the files to move, cut them, step into the target directory and tap the Paste button)+, with arbitrary depth---++ (use cut/paste to paste files there)----+, visible from FTP / File Sharing- (promised for future versions)---+ (using stacks; adding files to them is not the most intuitive task; stacks aren't file system folders)-+ (both at uploading – on the uploading desktop – and on the iPad)--- (there’re predefined folders for separate media types though)-+-+ ([Documents / Edit [button at upper right]/Settings [button at upper left in the Documents pane] / Create Folder; moving is done via the dedicated “Move” icon in Edit mode and not Cut / Paste utilized by most other readers)+ (use cut/paste to paste files there)-++--+; you can move files freely around-
Possible to rearrange the order of the titles in the library?+ (both in icon and standard list view)+ (starting with 1.3)------+ (standard drag zones)------ (no way of moving books to folders straight on the device – books must be re-transferred via FTP or iTunes File Transfer)--------+--+ (via Edit, which switches to the traditional, rearrangable-by-dragging list view)---------
Auto-sorting by…Name unless you rearrangeName; can’t be disabledName; can’t be disabledName; can’t be disabledNameName; can’t be disabledAuthor / Title / Date in addition to the date of last accessName-NameName (with different types grouped together)NameName / Date of AdditionNameNameNameNameNameName / Date, switchableName; can’t be disabledName; can’t be disabledName; can’t be disabledTitle / Author names and groups (there are three of the latter; you can assign your own PDF file to any of the three groups)-NameName / Date-Title and ordering by the date of last access. The latter is pretty useful and pretty much missing from most other titles.Name / Date / Size / Type (settable in Documents / Edit [button at upper right]/Settings [button at upper left in the Documents pane])NameName / Recently Opened / Recently Added (in non-default Detail view – see the second icon in the upper left); the two being pretty nice.NameName / Date / File TypeNot orderedNameNameName / Last modified / Size / Type (icon in the bottom center)
Built-in access to online PDF / ePub repositories?+ (Store button in the upper left corner)----Some oriental one with very few (6 or 7) titles; no additional repos can be added. (Use the book icon in the far left to gain access.)-----------This is the only way of transferring files to the app. It has support for PDF lookup but it’s very rudimentary and way worse than that of Stanza.----+ (excellent: under Get books [second tab on the tab bar], the Catalog bar, tons of easily downloadable books. Also, other Web sources can be added to the list. There’s also support for searching for shares in the neighbourhood.)--------+ (FeedBooks, ManyBooks.net, Project Gutenberg, Internet Archive Catalog)-----
Search for strings in titles?+ (in List view only)+See iAnnotate+ (Find Files [second horizontal tab on the upper right] / By name)+---+? (There’s a title search icon [top left] in the dir view; however, it just didn’t seem to work OK)---+-+------------+? (There’s a title search icon [top left] in the dir view; however, it just didn’t seem to work OK)+ (in List Details view – see above)-----+ (icon in the bottom left corner)
Search for freely editable tags in titles?-+, by tapping the Info button in the file list viewSee iAnnotate--+ (icon at the left bottom in My Bookshelf view; select the book you want to add a tag to, ta the + icon (the second one at the bottom from the left) and Add a New Tag), and filter the list based on tags.-------------------------------
Automatic groups?-Annotated / Recent / Unread / New Docs / FavoritesSee iAnnotateRecently read / added (“Recently” is 2 weeks by default; can be changed in Settings / General Settings / “Recently” means). “Read” flag can be en/disabled under Manage Files.Recents-- (Recently Opened Books list)--------------------- (apart from the Recent ordering explained above)--- (apart from the two Recent orderings)------
Misc.: Remembers last file / position in it?+ / +++- (by default; can be enabled under General / Reopen last file) / ++ / +-/+-+- / ++ / +--+ / ++ / ++ / +- / +-++ / ++- / +- / -+ (can be disabled)- / --+++ (in Recent view) / + (but doesn’t load it automatically, upon restart)+ / + (auto-open can be disabled)+ / ++ (in Recent view) / + (but doesn’t load it automatically, upon restart)+- / +- / ++- / -+
Zoom allowed?+++++++ +++++-+ (note that, if you do zoom in, the program will not make the text / graphics crisper – it’ll plain zoom into the previously rendered, low-res image. In this regard, it’s way inferior to (most of?) the alternatives+++++-+++++-+Not manually – upon double-tapping the screen, it automatically crops. It works very well and is excellent.+++n/a (textual only)++; very well implemented in two-page Landscape mode+Partial (only via icons, not using arbitrary zoom levels)+
Copy text-+ (doesn’t use the system’s standard text selector but uses a “select while touching” approach; multiple selection possible. Easy to use and reliable.)See iAnnotate+ (starting with version 3+, you no longer need to switch to reflown text mode to use the fourth icon at the bottom to copy the entire page. Now, you can use text selection as in, say, Safari.)+-----------------+ (albeit a bit clumsy: it, first, via a long tap, dumps all the text of the current page [with unofficial PDF’s] / the current paragraph to a temp page; it's there that you can highlight / search for definition)-----+ (Most of the advanced functionalities like these only accessible in the (default) Readdle PDF Expert view mode and not in „iPhoneOS viewer” (see Settings / View PDF in).)-++-----
Text reflow (mostly for the iPhone)---++-+ (default [and only] mode was before 1.8; under 1.8, can no longer be initiated on the iPad)--------+------+ (long tap, a secondary, small window for display; because of size, pretty hard to use. With officially downloaded files, it only lists the current paragraph and is, therefore, not recommended. Use the built-in font size increase/decrease icons instead – they work just great with officially downloaded stuff – but not at all with other PDF files.)-----+ (via Arrow icon / Text Reflow; left from +)--+ (default and only mode)-----
Turn down brightness+ (the best of all as it directly decreases screen brightness, while all the other brightness setting-capable apps just make white more black. This means far better readability & contrast)+ (Settings / Interface / Screen Brightness)See iAnnotate+ (first icon on left; two states only; can be adjusted in Settings)-+ (dedicated slider)+ (color inversion only)-- (“Night” button; in Settings, an additional slider)+ (fine-tunable in system-level Settings – that is, not from inside)----+ (last-but-one icon in the lower right corner)-----+ (Bottom-most slider in Settings in Browsing mode)-+ (downwards gesture; it even supports color negation [white => black etc.] via the third icon)---+ (in-app)--+ (fine-tunable in system-level Settings – that is, not from inside)-+ (two-state switch to change between "day" and reversed-color "night" mode)-++--
Page thumbnail view+ (large-sized ones: very slow to generate compared to Folio – about the same speed as Bookman)--------+ (starting with version 1.2); very fast generation----+, very fast to generate, unlike with, say, Bookman; slower than iBook.-----+--+ (here called as “Outline” and accessible in the half right. Way faster and better than that of Bookman.)------------+ (pretty useless compared to the other thumbnail-capable apps: only two /three thumbnails visible at a time in Landscape / Portrait)
Access to TOC-+ (current tab / Navigation… / Outline…)See iAnnotate+ (7th Book / Favorites icon)+-+ (misfunctioned in pre-1.8 versions)-++--+-+ (upper right icon)+ (albeit buggy, also admitted by th developer)------+-- (!)- (!)+- (!)++++----- (!)
Bookmarks? Pages only or any word / expression?+, pages+, any word (tap the word for at least 0.3s and lift your finger / Bookmark; standardized format visible in other readers)See iAnnotate+ (favorites [7th] icon / Add Bookmark) / Page onlyPages only-+, pages+, pages+, pages+ (left menu / Add / View Bookmark)-+ (page)--+ (page)+ (page)+ (starting with 1.1); page only---+ (starting with 2.0); page only-+, pages+, pages--+ (page)-+ (any word; several on the same page)+ (left menu / Add / View Bookmark)+ (it refers to highlighted text as bookmarks)------
Clickable external hyperlinks?+++++---------++------------+-+------
Inner, clickable image / table / page hyperlinks?+++++-------+-+-------------+-+------
Full screen modePartial (status bar remains visible)Partial (with status bar); change with a single tap anywhere but the left/right edges of the screenSee iAnnotate+ (no annoying icons / status bar; automatically switches to this mode)Partial (with status bar)+Partial (status bar remains visible)-Partial (status bar remains visible)+ (no status bar, no icons; switch back with a single tap)--Partial (status bar remains visible)-Partial (status bar remains visible)Partial (status bar remains visible)--Partial (status bar remains visible)+Partial (status bar remains visible)-++Partial (status bar remains visible)-Partial (status bar remains visible)Partial (status bar remains visible)Partial (status bar and page scroller knob still visible)+ (no status bar, no icons; switch back with a single tap)Partial (status bar still visible)partial (status bar visible)Partial (status bar and page number visible)Partial (status bar visible)- (its own, thick top bar always visible)-+ (switching back with a tiny, always-visible icon)
Annotation:-+-+Very basic. Starting with 1.14; requires the presence of the free external program "neu.Notes" from neu.PEN LLC. All it does is exporting the current page to neu.Notes, where, as an individual image file, you can later annotate it. There isn't any way of even showing a page is annotated back in CloudReader.---------+; due to the partial incompatibility with 4.2b2, I coulnd't test this in 1.7. In earlier versions, it used to be definitely inferior to iAnnotate / GoodReader / ReaddleDocs, though:
  • doesn’t write back to files in a standardized way
  • they’re always visible, unlike how better annotator apps do
  • a note / highlighting will only be displayed in the same orientation (LS / Portrait) and, what is worse, the same zoom level. If you zoom in/out just a little bit, all the highlights will be gone
  • highlights are tied to the actual screen coordinates and not that of the underlying document – actually, this is what the previous bug is caused by
  • ------+ (with books downloaded from the built-in library sources, it works wonderfully: tap-and-hold the text; the given paragraph will be highlighted and, then, dumped to the text view window; there, the word your finger is currently on is selected. With PDF’s from other sources, I’ve got far worse results; sometimes the extracted text was complete garbage.)-----+ (tap-and-hold text; select Highlight from Copy / paste menu. It's now standardized – highlighting is visible in other PDF readers. Annotations work in pretty much the same way and are also standardized. Previous highlights can be cleared. No freehand drawing, as opposed to iAnnotate!)-+ (see remarks with Readdle – the same developer)------
    Highlightn/a+n/a++n/a---------n/t (4.2b2 incompatibility)------n/t-----n/t (couldn't test - for some reason, on my 4.2b2 iPad, displaying the context menu simply stopped working)-n/t------
    Underlinen/a+n/a++n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Strikeoutn/a+n/a++n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Noten/a+; can be made sticky so that they aren't hiddenn/a++n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Freehand drawingn/a+n/a++n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Line drawingn/a+n/a+-n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Oval drawingn/a-n/a+-n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Selectable drawing color / pen size / opacityn/a- / - / + (arbitrary grade)n/a- / - / -+ / + / + (4 grades)n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Undo / Redo supportn/a+ / +n/a+ / -+ / -n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Stampn/a+, with several dozen stamps (arrows, exclamation marks etc). Can't show stamps created in other apps!n/a+-n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Insertn/a-n/a+-n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Replacen/a-n/a+-n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Square drawingn/a-n/a+-n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Arrow drawingn/a-n/a+-n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Showing (but not editing!) other kinds of annotationsn/a-n/a+: typewriter text, cloudy shapes, arrows, file attachments, stamps-n/a---------n/t (see above)------n/t-----n/t (see above)-n/t------
    Rendering: Quartz2D vs. UIWebViewQuartz2D UIWebViewUIWebViewQuartz2D Quartz2DQuartz2D Quartz2D Quartz2D Quartz2D UIWebViewUIWebViewUIWebViewQuartz2DQuartz2DQuartz2DQuartz2DUIWebViewUIWebViewQuartz2DQuartz2DQuartz2DUIWebViewUIWebViewUIWebViewQuartz2DQuartz2DQuartz2DBoth; switch between the two in Settings / Viewers / View PDF in.UIWebViewQuartz2DTextUIWebViewQuartz2DUIWebViewQuartz2DQuartz2D
    If it uses Quartz2D, does it have some kind of page pre-caching to speed up rendering when quickly browsing pages, explicitly mentioned / speed of turning pages and scrolling?+ (as opposed to the initial iBooks version, very fast)n/an/a+ (enabled by default – settings -> PDF Files -> Pre-cache adjacent pages) – VERY fast! Excellent!?; fast+ (Considerably faster than, say, PDF Comrade. This has also been affirmed by the dev- the app indeed caches the previous / next page.)OKNot the fastest and it uses some pretty ugly page switching (no double buffering?)- (could be a bit faster...)n/an/a- (this is by far the worst app when it renders local PDF files - way-way wose than aything else based on UIWebView. Interestingly, remote (Web-based) files are rendered far quicker. There’s something fundamentally wrong with the rendering code.)- (one of the fastest, if not THE fatest - REALLY good!)- (rather slow, not recommended because of this)Pretty fast- (very fast though)n/a- (pretty fast though - considerably faster than several other, UIWebView-based apps; e.g., PDFReader by YUYAO)- slowish- (not the fastest; clearly it doesn't catche)+ (thumbnail generation & paging runs in background); very fast to turn pagesn/a-; however, it’s considerably faster than, say, PDF Comrade- (pretty fast though - considerably faster than several other, UIWebView-based apps; e.g., PDFReader by YUYAO)- (pretty fast though - considerably faster than several other, UIWebView-based apps; e.g., PDFReader by YUYAO)-; however, it’s considerably faster than, say, PDF Comrade. (Also confirmed by developer: both next and previous pages are pre-cached.)-; fast but not as fast as the in this respect best titles -; not the fastest; however, it’s considerably faster than, say, PDF Comrade- (a little bit slower than some other readers but still faster than, say, PDF Comrade)- (not very fast - definitely slower than some of the other, even UIWebView-based apps like Mobile Studio by Matt Stoker / Pixio or PDF Word Excel File Viewer by Concrete Software)- (pretty fast though)n/a n/a- (quite fast)n/a- (however, page switching is fast)- (middle-of-the-road: I’ve seen both faster and slower titles)
    Making use of the full screen estate in Landscape by showing two adjacent pages?-n/an/a+ (must be explicitly enabled: 5th icon, “Double Pages”)-+- (one page only)--n/an/a (and it doesn’t even have full screen, which is particularly annoying in Landscpe mode)n/a (and it doesn’t even have full screen)-- (file list will always be displayed on the left)+-n/a (file list can now be hidden on the left, unlike in previois versions)n/a (and it doesn't even support Landscape!)- (one page only)-+ (Only mode)n/a-n/an/a----n/a-n/a n/a+; with very well implemented zooming, in which only GoodReader is better. Can be disabled to switch to one-page mode.n/an/a - there isn't even Landscape support (!)-
    App password protection like in iCab Mobile (unless you have puchased Locktopus from Cydia)-+ (Settings / Advanced / Application Lock)- (not yet?)+ (Settings / General Settings / Ask password on startup); note that it has even more password configuration capabilities+-----------------------+ (see Settings / Passkey lock)---+ (Settings / Security / Passcode Protection)----
    Keep multiple documents opened at the same time-; however, switching back and forth is pretty fast++-------Two with a trick: display a local file from the Files tab and an online file from the Browse (here: “Borwse”) tab. This works fine.---------- (but switching is very-very fast and involves very few taps)-----; however, documents are cached in memory and kept open until an internal limit is reached. This allows fast switching back to a previous document.-----------
    Dictionary support----------------------+ (built-in dictionary [… / Dictionary] with direct word entering; alternatively, tap-and-hold a word and, when the text dump is presented, tap the “Define” button. When dumping works, that is.)--------+ (StarDict modules need to be installed separately)-----
    Final remarkIt has both its advantages (direct Store access; brightness setting; quick thumbnails; searching for more than one word; free and "official") and disadvantages (no text copy, no annotations / highlighting, no cropping, no double-page landscape view, not even support for TOC.) If you want to run extensive searches in more than one book at the same time (assuming you don't need to search more than one word), this title is by far the best, along with iRead PDF. Other good features include keeping several files opened simultaneously (albeit BookMan also lets for switching between them quickly) and, of course, annotating PDF files. In the latter area, however, GoodReader and ReaddleDocs are catching up very quickly.Particularly recommended if you need to search more than one book a time or keep more than one open. Otherwise, iBooksor BookMan 2+ is a better, faster, more stable choice.Now that it has received highlighting / annotation / VGA output / standardized text copying capabilities, without doubt the best, particularly if you also take the price into account. It's a steal for $1 – and will still remain probably the best buy for $3 if the price is indeed increased. A MUST buy! Note that it also supports rotating entire files (for incorrectly rotated scans)Not bad; in some respects (e.g., Selectable drawing color / pen size / opacity), even better than the iAnnotate + GoodReader combo.Pretty nice for free – better than some of the commerical titles. Note that it also remembers the page-turning direction (western vs. eastern) for each book separately, which is very important to read Japanese comics. Unfortunately, the annotation capabilities are very weak. Nevertheless, I'd go for either iBooks or iRead PDF instead, depending on your needs (e.g., in-book and generic search capabilities), should you want to stick with strictly free titles.While the current version works much better than pre-1.8 ones, which only used text-only mode (fully eradicating layout info), there're still much better titles - even some of the free ones (e.g., iBooks / iRead PDF) are way better.Avoid it. Really poor.Good; however, I still miss – most importantly - link and text copy support.Not bad for the price, particularly if you need folder / image import & PDF assembly support, the latter being pretty much unique. Unless you can’t live with the problems (non-clickable links etc.) Almost the same as PDFReader 2.1 by YUYAO. Don’t purchase both!One of the worst titles – particularly for $5, it’s probably THE worst. Don’t even think of getting it – unless you need to use the two-files-open-at-the-same-time hack.What a letdown – particularly because of the unbelievably bad rendering speed of local files. Don’t be misled by the good rating – this title is probably the worst commercial title. Actually, it’s worth checking out the US remarks – the 5 star ones (along with a 4 star one) have all been posted on 06/14 from users named using the same pattern (name-number). Yes, the developer is cheating really bad. AVOID!Not very good (except for the VERY quick page turning support) – there’re definitely better titles for the same priceDon’t bother – this title is pretty bad.If you do need thumbnails and/or FTP support (as opposed to HTTP) and/or folders and/or in-text searching (including more than one-word expressions), this title can be considered – these are the strengths of it.A nice attempt at adding textual notes and highlights – but still a long way away from iAnnotator or ReaddleDocs. Warning: some options are missing from the Settings dialog in Portrait mode – must be used in Landscape! Note that the screen flickering issue, plaguing previous versions, has been fixed in the latest versions.Don’t bother – this title is really bad.Best to avoid (for example, it doesn't even support Landscape mode) – use Stanza for accessing online libraries.Not recommended – there’re way better free alternativesVery simple and feature-lessCompared to pre-2 versions, it's VERY nice. One of the best free readers. If you plan to pay for your reader, GoodReader is a far better choice, though.Poor, not recommendedGreat when you want to access online, free PDF files with little effort. Not so great with your own PDF files, particularly if dumping the text doesn’t work.While it has some nice features (e.g., able to see the end and the beginning of two consecutive pages with locked scrolling, thumbnails, fast scrolling), some of the similarly priced apps (e.g., GoodReader) is far more powerful.Very poor for the price; stay awayA bit on the weak side; however, version 1.1 promises a lot of goodies (e.g., two-page landscape display, zoom / cropping, search, and fullscreen support; search is planned for 1.2).Mediocre for the priceRather featureless for the price. Its only advantages are the intelligent zoom and the Recent ordering; hope these features will soon be implemented in other PDF readers too.Pretty nice – along with iAnnotate, it's the only app to have flawless, standard notation and highlighting capabilities for half the price. It, however, doesn't support freehand drawing. While it's able to find separated words, it can't search in more than one book at the same time and multi-document viewing isn't supported either. Not bad for the price, particularly if you need folder / image import & PDF assembly support, the latter being unique. Unless you can’t live with the problems (non-clickable links, not the fastest scrolling etc.) Almost the same as PDF Reader 1.1 by Kdan Mobile Software LTD. Don’t purchase both!If you need a cheap app where you must use highlight and copy frequently, probably the best of the bunch (unlike GoodReader)In no way recommended on the iPad because of the text-only rendering mode. Unfortunately, the CHM support isn't better either - it's far-far inferior to that of CHMate (Lite) because of the completely messed-up layout, the missing images and styles. Don't even think of getting it. Pretty nice for a free but still usable multifunction (MS Office (Word, Excel and PowerPoint) / iWork (Pages, Numbers and Keynotes) / OpenDocuments (OpenOffice) (Text, Spreadsheet, Presentation) / Plain Text and RTF (Rich Text Format) / Web Archives / HTML files / ZIP) file handler / viewer. PDF-wise it's pretty weak though - there're much better free alternatives (e.g., iRead PDF or iBooks).Not very powerful; the only real uniqueness is the simultaneous zooming with two-page landscape reading. Nevertheless, GoodReader's combined cropping and two-page display capabilities are clearly more powerful.You basically get what you pay for. Nevertheless, it's one of the less-recommended apps because of the total lack of features.One of the worst app, in no way recommended.PDF suppohrt is rather poor (e.g., not even TOC support), use something else for reading PDF files