# KyBook 3 Ebook Reader — user reviews > 670 indexed App Store user reviews of KyBook 3 Ebook Reader by Konstantin Bukreev, rated 4.70/5 from 4,616 ratings. - Source: https://appshunter.io/ios/app/kybook-3-ebook-reader/id1348198785/reviews - App overview in markdown: https://appshunter.io/ios/app/kybook-3-ebook-reader/id1348198785.md - Rating breakdown: 5★ 3,845 · 4★ 384 · 3★ 146 · 2★ 52 · 1★ 189 ## What do users think of KyBook 3 Ebook Reader? Overall sentiment: mixed **Pros** - 🚀 Excellent design, close to no ads - 🚀 Handles various file formats well - 👍 Customizable, lots of features - 👍 Stable and fast - 👍 Good for reading comics/manga - 👍 Versatile, supports many features **Cons** - 🐛 Sync and account issues - 🐛 Crashes, bugs, and compatibility problems - 🔍 Confusing interface, hard to use - 💰 Paid features and subscription model - 🔍 Missing key features like page turn animation - 🔍 Ads and monetization issues **Commonly reported bugs** - Inability to open/read certain file formats - Sync and account creation issues - Problems with PDF and image display - Crashes and compatibility problems - Duplication of books in library **Most requested features** - Left alignment option - Dark mode/OLED black theme - Improved image handling - Better support for Chinese language - Vertical page flip - Improved text-to-speech capabilities ## Newest reviews (13 of 670) ### 4/5 — Pretty good *2026-07-30, version v0.7.8* The best reader for translating individual words and phrases that I’ve seen. But: selecting text is very annoying, eg it often selects blank spaces and dragging a selection field is unnecessarily difficult. That process needs an upgrade. I’d also like to be able to customize the popup menu. ### 3/5 — Needs serious updating *2026-07-20, version v0.7.8* Great start! I use it as one of my primary readers.it finds books that sten’t in the newsgroups! But it needs work for stability and feature enhanent. ### 4/5 — 概ね満足 *2026-05-29* 一括でインポートができる時点でiOSアプリの中では上位に入る。 ソート機能について、ファイル名でソートが出来たら本当に完璧。 ### 5/5 — Excellent. Bravissimo. *2026-04-18, version v0.7.8* First it’s support reading fb2, epub. Second it’s support listening your text book not audio but text format. Third it works with built in Test-to-Speak (tts) engine perfectly. No ugly accent or tone or anything. ### 2/5 — No more update? *2026-04-15* This app is awesome but has not been updated for years. I hesitate to recommend it to my friends and might switch to other apps. ### 5/5 — Все круто *2026-04-14, version v0.7.8* Очень Крутая читалка но на айфоне немного глючит. Читает знаки скобок и не ставится на паузу с наушников. А если поставить то не запускается обратно. Но это мне кажется в айфоне проблема а так супер суперский советую ### 3/5 — Все было замечательно, но начало лагать *2026-04-05, version v0.7.8* Внезапно после обновления до последней версии ПО приложение начало лагать, сенсер просто переставал реагировать на прикосновения, такая проблема появляется в основном при открытии поиска в книге ### 5/5 — Free and easy *2026-04-05, version v0.7.8* Makes it easy to read my books and pdfs ### 5/5 — Excellent for pdf’s *2026-03-28, version v0.7.8* Pleased and disappointed at the same time-for pdf’s this is tops-nice fast rendering of documents and folder options can’t be beat. Tried and deleted many readers. However, no matter what I do, epubs won’t render no matter what. They all throw an error so I gave up on epub for IOS. Android beats it hands down but for pdf, this is second to none. ### 5/5 — La meilleure *2026-03-27* Et de très loin. Bravo ### 4/5 — Great app! *2026-03-05* But I've run into a small issue. I purchased the Pro version from the China App Store, but you've since removed the app from that store, so I'm unable to restore Pro access on my new device. Could you help resolve this? I can provide my purchase receipt if needed. ### 3/5 — Not able to sign in using google *2026-02-18, version v0.7.8* Gives 502 error ### 5/5 — Meilleure;application *2026-02-09* Pour ma part meilleure que le book Apple, affichage des chapitres du nombre de pages, gestion de dossier efficace et surtout on s’y retrouve. Allez une idée on ajoute l’heure et le pourcentage batterie en tout petit comme le chapitrage et je suis heureux. Grand merci à l’équipe. ## Most critical reviews (10 lowest-rated) ### 1/5 — Errors *2026-07-31, version v0.7.8* The KyBook e-reader error is caused by a critical issue: the developer has abandoned the app, and the SSL certificates for its sync servers have long since expired. Since Apple's built-in mechanisms (iOS/iPadOS) strictly require a secure TLS connection, an outdated or missing certificate on the KyBook server reliably blocks authorization and syncing with error code -1200. ### 1/5 — Safety breach *2026-07-31, version v0.7.8* Crashes ### 1/5 — 簡体中国語がデフォ？ *2026-05-31* さっぱりメニュー項目がわからないので使えない せめて英語なら使えるのだが ### 1/5 — Lost all 3000 of my books *2026-04-12, version v0.7.8* I use an apple iPad mini. After the last update, I cannot access my Books. I keep getting this pop-up wanting me to subscribe. Files wants to default to Kybook3 so I have to override it back to Kybook which I like better anyway. ### 1/5 — App appears dead *2026-04-09, version v0.7.8* Was recommended this reader. So tried it out. Not bad so decided I’d try the free trial for the plus version. Trial started fine but couldn’t create account for cloud sync. And now after doing more research, app appears dead. Hasn’t been updated in years. ### 1/5 — pro version does not work well on djvu and pdfs intel ipad sequoia *2026-03-12, version v0.7.8* Not for intel ipad pro with macos Sequoia. Why? I bought the pro version so I could look at a djvu ebook. I had seen the book on Kyb=Book 2 - clumsy to use but did work. With version 3 I got ads inserted every few lines in the djvu. In addition I got ads inserted into pdfs that I had previously opened. The hidden menu line in sequoia showed up, but did not work. Could not change the font size, the font, or anything else. It is obscure how to import a djvu or pdf that is already on the ipad. So found no manual, faq, or instruction. By accident I tapped a bizarre symbol on the right of the menu bar and that was the key to import some files already on the ipad. The symbol frequently did not appear and required a lot of punching buttons to make it appear. Maybe KyB 3 works wonderfully on other devices or other versions of macos but not on my ipad. Highly unintuitive app. Waste of time pushing buttons, changing screens, and searching internet/ ### 1/5 — Quase todas as funções são pagas *2026-02-23* Apenas funções básicas que qualquer outro aplicativo tem, são gratuitas ### 1/5 — You've got to be kidding... *2026-01-05, version v0.7.8* I have to upgrade to the Pro version AND pay an annual membership fee? How about Give you my first child and include you in my will too. Get your hand out of my pocket. ### 1/5 — Schlechte App *2025-10-29* Immer Fehler ### 1/5 — Gateway error *2025-10-18, version v0.7.8* Cannot login or create an account to sync books. Unusable ## Most praised reviews (10 highest-rated) ### 5/5 — Only reader for me. *2026-08-15, version v0.7.8* This is the only reader I’ve found that allows you to organize your library by folders. If you don’t know. All you have to do is put ebook in a folder and KyBook reads the folder and creates a library based on folder name. Super easy. Super intuitive. I REALLY HOPE that an update happens. I’d hate for this reader to die. Still waiting on the next version. ### 5/5 — good *2026-07-31, version v0.7.8* very good ### 5/5 — You can change text and background to any color! *2026-07-26, version v0.7.8* This is perfect for nighttime reading since you can can figure it to any color. I do dark red for the text and black for the background at night. During the day I do a Manila yellow background on black text. App is perfectly stable and works offline with ebook files and is free! Perfect app! ### 5/5 — Perfection *2026-07-13, version v0.7.8* This app is just perfect ### 5/5 — Great for free *2026-06-21, version v0.7.8* There’s some glitches, but it’s the best free text to speech reader I could find and it works great. Saves place in the book and the voices are as good as you can ask for for normal tts ### 5/5 — I’ll never let go, Jack *2026-05-27, version v0.7.8* I can’t live without this ebook reader. There are so many bells and whistles, and it is just not that difficult to figure out. ### 5/5 — Excellent Reader *2026-05-21* It’s a very good book reader. Its features like translate and auto scroll are very useful for me. Very nice app. ### 5/5 — The most amazing reader *2026-05-20, version v0.7.8* I love this so much. The app works smoothly, has scroll and text to speech with many convenient options. The best reader app I have tried! Highly recommended ### 5/5 — The best Textbook Viewer on iOS *2026-05-17* If you are struggling to get a good reader for your textbooks. Buy it !! The downside is its not updated (kind of abandoned), but trust me works better than almost anything else out there. Ive tried so many junk ebook readers. Also has great multitab support !! Highly Recommended. ### 5/5 — changing text to speech voice works again! *2026-04-27, version v0.7.8* the main reason i use the app was broken, i got the junky default voice no matter if i choose a downloaded better version. however this seems to be fixed now! --- *Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-31.*