Pick KyBook 3 if
you read many file types (DjVu, FB2, RTF, MOBI), use SMB shares, WebDAV or Dropbox, want a low price, or your iPhone cannot run iOS 18.1.
justRead vs KyBook 3: the long format list, or an app that is still updated
KyBook 3 opens DjVu, FB2, RTF and more, turns pages with a curl and reads from your own servers, but its newest release is dated 23 February 2019. justRead is current: widgets, Shortcuts, goals and read aloud with voices that run on the device.
Try the whole app free for 14 days.
justRead.app
Reader for books, comics and audiobooks
KyBook 3
Reader with a long list of formats
Which should you pick?
Pick justRead.app if
your iPhone runs iOS 18.1 or later and you want an app that is still updated, with widgets, Shortcuts, goals, Calibre sync and read aloud with voices that run on the device. It costs $79.99 once, after a 14-day trial.
The format veteran and the current app
Both read DRM-free books. They differ in how many file types they open and in how recently they were updated.
KyBook 3 opens DjVu, FB2, RTF and CBT comics as well as EPUB and PDF, turns pages with a curl, reads aloud, connects to OPDS catalogs, and keeps books on cloud drives and network shares. The newest release in Apple's lookup is dated 23 February 2019.
justRead was updated in October 2026. It opens fewer file types and does more on the phone: ten widgets, Shortcuts and Siri, goals and streaks, read aloud with voices that run on the device and a two-way Calibre sync.
Reviewers still use KyBook 3 in 2026, and several ask for an update. One could not create the account for its cloud sync. Those are individual reports, quoted below with the rating and version.
What each app costs
KyBook 3 is the cheaper app at every tier.
KyBook 3: free to download
The App Store lists KyBook 3 as Free with in-app purchases. Upgrade to Pro is listed at $4.99.1
KyBook 3: sync is a subscription
The store says synchronization requires a subscription. It costs $4.49 for 3 months or $14.99 for a year.1
KyBook 3: what Pro adds
The maker's site lists DjVu, tabs, a content server, auto scrolling, drawing on pages, PDF Reflow and Tor as Pro features.2
justRead: free for 14 days, then paid
justRead costs $4.99 a month, $29.99 a year or $79.99 once, after a 14-day trial.34
justRead and KyBook 3, row by row
A Yes or No always has a source. Click a mark to see it. Not listed means the store description and the maker's archived site do not mention it.
| What matters | justRead.app |
KyBook 3 |
|---|---|---|
| Price and plans | ||
| PriceWhat you pay | $79.99 onceA 14-day trial, then $4.99 a month, $29.99 a year or $79.99 once.34 | FreeUpgrade to Pro is listed at $4.99.1 |
| What Pro adds | Trial, then paidThe 14-day trial is followed by a paywall.4 | DjVu and morePro adds DjVu, tabs, a content server, auto scrolling, drawing on pages, PDF Reflow and Tor.2 |
| Updates and devices | ||
| Newest releaseHow recently the app was updated | 5.6On the App Store since October 2026.5 | Feb 2019The newest release in Apple's lookup is dated 23 February 2019.6 |
| Oldest iOS | iOS 18.145 | iOS 11.01 |
| iPhone and iPad | iPhone and iPad4 | iPhone and iPadThe store lists it as designed for iPad and not verified for macOS.1 |
| Books and formats | ||
| EPUB and PDF | Yes4 | Yes2 |
| MOBI and AZW3 | NoThe import list holds no MOBI or AZW3 entry.4 | Yes2 |
| FB2, TXT, RTF and DjVu | NoThe import list holds no FB2, TXT or DjVu entry.4 | YesDjVu is a Pro feature.2 |
| Comics | CBZ and CBRCBR is repacked into CBZ on import.4 | CBR, CBZ and CBT2 |
| Audiobook files | YesPlays m4b, m4a, mp3, aac and flac with a chapter list.4 | YesPlays MP3, M4A and M4B, and streams audiobooks from cloud storage.2 |
| Reading | ||
| Page turning | Page curlAn opt-in page curl for paginated EPUB, and continuous scroll.4 | Curl, scroll, slide2 |
| Read aloud | On the deviceApple voices, and two sets of downloadable neural voices that run on the device. PDFs are not read aloud.4 | YesThe maker's help page lists a known issue: speech stops after one word, sentence or paragraph.27 |
| Reading statistics and goals | YesA Statistics tab with a goal calendar heatmap, a daily goal, a pages goal, a yearly books goal and a streak.4 | Not listedThe maker's site names no statistics, reading goal or streak.2 |
| Dictionaries | Dictionary sheetA dictionary sheet with an extra Wikipedia source.4 | Your ownCustom dictionaries in Dictd, StarDict and Lingvo DSL formats.2 |
| Search in a book | Full textSearches the whole book or the chapter, with a match counter.4 | Full text, fuzzy, regexSearches textually, fuzzily or with regular expressions.2 |
| Drawing on the page | NojustRead does not draw ink on a page.4 | YesDrawn annotations work with Apple Pencil in any ebook.2 |
| Export notes | Markdown, PDFExports a book's highlights as Markdown and as PDF, and to Readwise.4 | Four formatsAnnotations export as Markdown, HTML, PDF and RTF.2 |
| Library and sync | ||
| Built-in sync | iCloudSyncs position, bookmarks, highlights, finished state, covers, settings and fonts.4 | SubscriptionSync needs a subscription: $4.49 for 3 months or $14.99 for a year. The maker's site marks syncing the files as coming soon.12 |
| Cloud drives and shares | Through FilesHas no Dropbox, Google Drive or OneDrive connector. Those services appear as folders the Files app shows.4 | DirectBooks can live in iCloud Drive, Google Drive, OneDrive, Dropbox, Yandex Disk, SMB shares or a WebDAV server.2 |
| OPDS catalogs | YesShips Project Gutenberg as a built-in catalog and downloads books from any OPDS catalog.4 | YesA built-in list, your own catalog such as a Calibre content server, and .onion catalogs over Tor.2 |
| Calibre | Two-way syncImports from a Calibre content server and syncs highlights, notes and bookmarks both ways.4 | As a catalogA Calibre content server works as your own OPDS catalog.2 |
| Read a book in place | YesReads a book from the folder you chose in Files without copying it.4 | Not listed2 |
| On the iPhone | ||
| Widgets | TenFive home-screen widgets and five lock-screen widgets, plus a Control Center control.4 | Not listedNeither the store description nor the maker's site names a widget.26 |
| Shortcuts and Siri | YesExposes App Intents for Shortcuts and Siri.4 | Not listedNeither the store description nor the maker's site names Siri or Shortcuts.26 |
| CarPlay | YesPlays audiobooks and Read Aloud in CarPlay as an audio app.4 | Not listedNeither the store description nor the maker's site names CarPlay.26 |
KyBook 3 is closed source, so its cells describe its store listing and its maker's site, not its code. Every cell was re-read on 28 October 2026.
Read aloud in justRead
KyBook 3 has text to speech. justRead adds voices that run on the device.
justRead reads an EPUB aloud with Apple's voices and highlights the sentence being read. Two sets of neural voices, Kokoro and Supertonic, download once and run on the device.
KyBook 3's maker lists text to speech among its features, and its own help page lists a known issue where speech stops after one word, sentence or paragraph.
Where KyBook 3 is the better pick
Six places where KyBook 3 is better.
More file types
It opens FB2, TXT, RTF, DjVu, MOBI and AZW3 as well as EPUB and PDF, and CBT comics on top of CBR and CBZ. justRead's import list holds no MOBI, AZW3, FB2, TXT or DjVu entry.24
The price
KyBook 3 is free to download and Upgrade to Pro is listed at $4.99. justRead costs $79.99 once after its 14-day trial.13
Older iPhones
KyBook 3 needs iOS 11.0 or later. justRead needs iOS 18.1. An iPhone that cannot update to iOS 18.1 can still run KyBook 3.14
Cloud drives and network shares
Books can live in iCloud Drive, Google Drive, OneDrive, Dropbox, Yandex Disk, SMB shares or a WebDAV server. justRead has no connector for Dropbox, Google Drive or OneDrive, and those services appear only as folders the Files app shows.24
Drawing on the page
Drawn annotations work with Apple Pencil in any ebook. justRead does not draw ink on a page.24
Your own dictionaries and a sharper search
Custom dictionaries in Dictd, StarDict and Lingvo DSL formats, and book search that can be fuzzy or use regular expressions. justRead has a dictionary sheet with a Wikipedia source and a full-text search.24
Where justRead is the better pick
Six places where justRead is better.
It is still updated
justRead 5.6 reached the App Store in October 2026. The newest release in Apple's lookup for KyBook 3 is dated 23 February 2019, and the news list on its maker's site ends with v0.7.5 in February 2019.256
Widgets and the lock screen
Five home-screen widgets, five lock-screen widgets and a Control Center control that continues your book. KyBook's store description and its maker's site name no widget, lock-screen feature, Siri, Shortcuts or CarPlay.246
Shortcuts and Siri
justRead exposes App Intents for Shortcuts and Siri. Neither KyBook's store description nor its maker's site names Siri or Shortcuts.246
Goals and streaks
A daily goal, a pages goal, a yearly books goal, a streak and a statistics tab with a calendar heatmap. KyBook's maker names no statistics, reading goal or streak.24
Read aloud with voices on the device
Apple's voices plus Kokoro and Supertonic neural voices, all on the device. KyBook 3's help page lists a known issue where speech stops after one word, sentence or paragraph.47
Two-way Calibre sync
justRead imports from a Calibre content server and syncs highlights, notes and bookmarks both ways. KyBook 3 adds a Calibre content server as an OPDS catalog.24
How to move from KyBook 3 to justRead
Your books are files, so they move with you.
-
Export your annotations first
KyBook 3 exports annotations as Markdown, HTML, PDF and RTF. Keep a copy of those files before you move.2
-
Find your book files
KyBook 3 keeps books in iCloud Drive, Google Drive, OneDrive, Dropbox, Yandex Disk, on SMB shares or on a WebDAV server. The same files are what you add to justRead.2
-
Convert what justRead cannot open
justRead has no import for MOBI, AZW3, FB2, TXT or DjVu files. Convert them to EPUB or PDF first, for example with Calibre.4
-
Add the books to justRead
Open them from the Files app or Mail, or point justRead at a folder in iCloud Drive for a bulk import. justRead can read a book in place from the folder you chose, without copying it.4
-
Reconnect your catalogs
justRead downloads books from OPDS catalogs and imports from a Calibre content server, with a login and several libraries.4
-
Try it before you pay
The app starts with a 14-day free trial, so you can test it on your own books first.4
Note the page you are on in each book first, because reading positions stay inside the app that made them.
What KyBook 3's users say
Five App Store reviews from the US store, quoted as written. Three praise KyBook 3 and two are about its age.
This is the only reader I’ve found that allows you to organize your library by folders.
a truly well-polished ebook reader
The best reader for translating individual words and phrases that I’ve seen.
it hasn’t been updated in seven years and it won’t be connected to other apps unless it’s updated right away
app appears dead. Hasn’t been updated in years.
KyBook 3 questions
Is KyBook 3 free?
To download, yes. The App Store lists it as Free with in-app purchases. Upgrade to Pro is listed at $4.99, and sync is a subscription at $4.49 for 3 months or $14.99 for a year.1
Is KyBook 3 still updated?
What iOS does KyBook 3 need?
Does KyBook 3 have text to speech?
Does KyBook 3 have widgets, Siri or Shortcuts?
Does KyBook 3 turn pages with a curl?
Which formats does KyBook 3 open?
EPUB, FB2, TXT, RTF, PDF, DjVu, CBR, CBZ, CBT, MOBI and AZW3, plus MP3, M4A and M4B audiobooks. The maker says EPUB and PDF must be DRM-free. DjVu is listed as a Pro feature.2
Does KyBook 3 work with Calibre and OPDS?
Can justRead open DjVu, FB2 or MOBI?
No. justRead's import list holds no MOBI, AZW3, FB2, TXT or DjVu entry. Convert such files to EPUB or PDF first.4
Other readers worth a look
If neither app fits, these four have a page of their own.
Yomu: a $7.99 one-time price and a Mac app
Yomu Pro costs $7.99 once and works on iPhone, iPad and Mac. Yomu opens EPUB, Mobi, Kindle and PDF files, and CBZ and CBR comics. See justRead vs Yomu.910
Readest: free sync on desktop and phone
Readest is open source, and its Free plan syncs library, progress, highlights and notes across devices. It runs on macOS, Windows, Linux, Android, iOS and the web. See justRead vs Readest.111213
Anx Reader: open source with AI on your own key
Anx Reader is MIT licensed, syncs through WebDAV and runs on Android, iOS, macOS and Windows. Its AI assistant needs your own API key. See justRead vs Anx Reader.141516
BookFusion: one library on web, iOS and Android
BookFusion reads on the web, iOS and Android, and has an E Ink mode for Android tablets. Plans start at $1.99 a month and the pricing page shows no one-time purchase. See justRead vs BookFusion.1718
Sources and how we checked
18 sources
justRead.app makes justRead. Every justRead cell comes from the app's source code at the 5.6 release.
KyBook 3's cells come from its US App Store listing and Apple's lookup record, both re-read on 28 October 2026, and from the maker's own site and help page as saved by the Internet Archive on 22 December 2024. Those two pages are an archived copy, not a live read.
"Not listed" means the store description and the archived maker's site do not mention the feature. KyBook 3 is closed source, so this is a statement about its listing, not a code audit.
We did not install KyBook 3 or test it on a device. Its lines describe what its pages say, not how the app behaves for you.
Prices change. KyBook 3's come from its store listing, justRead's from its own site.
The reviews come from the US App Store feed and are quoted as written.
Checked 28 October 2026 against justRead 5.6 and KyBook 3 0.7.8.
- KyBook 3, App Store listing (US): price line, iOS version, rating and in-app purchases. apps.apple.com accessed 2026-10-28
- The KyBook maker's site, Internet Archive copy (captured 22 December 2024). web.archive.org accessed 2026-10-28
- justRead pricing and trial, from the justRead site. justread.app accessed 2026-10-28
- justRead 5.6 app behavior, read from the app's source code at the release build (our own review). accessed 2026-10-28
- justRead, App Store listing (US): version 5.6, minimum iOS and last update. apps.apple.com accessed 2026-10-28
- Apple's lookup record for KyBook 3: release date, release note and store description. itunes.apple.com accessed 2026-10-28
- The KyBook maker's help page, Internet Archive copy (captured 22 December 2024). web.archive.org accessed 2026-10-28
- KyBook 3, App Store reviews (US storefront), quoted as written. apps.apple.com accessed 2026-10-28
- Yomu maker's FAQ: the Pro purchase, its price and the devices it covers. yomu-reader.com accessed 2026-10-28
- Yomu home page: supported formats. yomu-reader.com accessed 2026-10-28
- Readest pricing page: what the Free plan includes. readest.com accessed 2026-10-28
- Readest README at the v0.12.16 tag: platforms. raw.githubusercontent.com accessed 2026-10-28
- Readest licence file at v0.12.16. raw.githubusercontent.com accessed 2026-10-28
- Anx Reader licence file at the v1.14.0 tag. raw.githubusercontent.com accessed 2026-10-28
- Anx Reader README at the v1.14.0 tag: sync and platforms. raw.githubusercontent.com accessed 2026-10-28
- Apple's lookup record for Anx Reader: the AI key note. itunes.apple.com accessed 2026-10-28
- BookFusion, reading apps page: platforms and E Ink mode. bookfusion.com accessed 2026-10-28
- BookFusion pricing page: plan prices. bookfusion.com accessed 2026-10-28