i2Reader Cloud vs Book.io
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
i2Reader Cloud
This app offers a comfortable reading experience with cloud synchronization across devices. Enjoy customizable layouts, interactive features like footnotes and dictionaries, and the ability to download books from various cloud services. It supports multiple formats and allows family sharing of libraries.
- iCloud synchronization for library and reading progress
- Customizable book layout (fonts, colors, spacing)
- Download books from Dropbox, Google Drive, Yandex Disk
- Interactive footnotes and dictionary support
- Family sharing and user reading statistics
- Supports FB2, EPUB, MOBI, DOC, PDF formats
- Auto-scrolling and auto-page turning
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Reading with comfort is a dream of any book lover! It’s more than 10 years already that my i2Reader has been making this dream come true. With each version of the app I add a bunch of new options and always try to keep the pleasure of reading a top priority. When putting books on digital shelves or turning over their 3D pages on any device (Mac, iPhone or iPad), you will always feel “I too Reader”* * - this is not a mistake :) Main features: • iCloud support: your library is synchronized in all your devices. You can start reading a book on iPhone and continue doing it on iPad or Mac! Everything from last the opened page, bookmarksо, highlighters to book metadata, including user's choice of a book cover, titles, genres, keywords, series etc. - is synchronized in each book; • Footnotes are displayed on the bottom of the page – like in real paper books! • Full support of 3D Touch: - in a library: to peek at a book info, press slightly on it; swipe up to bring up a context menu for this book; - when reading, you can assign 3D Touch to one of these options: Wikipedia or dictionaries. Press on a word and the assigned option will run right away, bypassing context menu. • Interactive guide to introduce features of the app; • Support of multitasking Side Over and Split View for iPad Pro, iPad Air or iPad mini; • Support Drag and Drop for iPad under iOS 11; • AutoScrolling – vertical text scrolling with adjustable by horizontal swipe speed; • Auto Turning – automatic page turning according to timer; • download books from Dropbox, Google Drive and Yandex disk as well. Google Drive now supports download of GDOC (Google Docs) files; • User's access: now all members of your family can read the same books not interfering with each other. Besides, the new feature enables you to highlight text fragments and comment on it, thus making up mini-chats in your own mini social/family networks :) • Review of reading statistics for both particular books and individual library users; • adjust brightness of the screen with a two-fingers vertical swipe; • finest configuration of a book layout for the most comfortable reading: everything like fonts, font size, colors, background is adjustable, including paragraph and line spacing; • i2Reader works with FB2 (also fb2.zip or fbz), EPUB (no DRM protection), MOBI, RTF, MS Word DOC/DOCX and PDF book formats; • different ways of page turning (including 3d page turning and vertical scroll); • voice/audio reading with the use of voice synthesizer; • easy selection and sorting of books based on various criteria - you won't get lost in your library and find your book in no time; • you can also create digital shelves which are also synchronized via iCloud; • support of starDict and XDXF dictionaries when reading; • Support of in-built iOS dictionaries; • support of Lingvo dictionaries when reading (if you have installed Lingvo app); • widget for notification center; • you can now share quotes to Facebook, twitter, Evernote or send then via email; • you can also download books from public OPDS libraries. All features in one simple and handy interface - now everything is at your fingertips! You are always welcome to share your opinion and suggestions to support@i2reader.net
Book.io
Manage your digital library of eBooks and audiobooks with a user-friendly interface. Customize your reading experience with various themes and text settings, and enjoy features like bookmarking and embedded media. Own and control your digital content.
- eBook and Audiobook management
- Customizable themes and text settings
- Seamless navigation and bookmarking
- Audiobook playback and reading/listening switch
- Embedded video and fixed format support
- Social media login
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Book.io is the eBook and Audiobook app that empowers you to manage your digital library on your terms. Transform your reading experience with a range of features crafted for maximum enjoyment. Key Features: 1. Effortless Reading: Navigate your eBooks seamlessly with our user-friendly interface. 2. Customizable Themes: Personalize your reading environment with Light, Paper, or Dark themes. 3. Tailored Text Settings: Adjust text size, line spacing, and fonts, including options like Open Dyslexic. 4. Bookmarking and Navigation: Easily bookmark pages and navigate through your reading material. 5. Media Support: Immerse yourself with audiobooks, embedded videos, and fixed format support. 6. Dark Mode: Read comfortably in low-light settings with our sleek dark mode. 7. Multi-Language Support: Experience Book.io in Spanish or English for a tailored touch. Why Choose Book.io? Embrace the future while preserving the past with our collection of Unchangeable, Unburnable, Unbannable eBooks and Audiobooks you own and control. Join our community of satisfied readers today. Download Book.io and embark on your journey of actual digital ownership. What’s New: - Audiobook Support: Dive deeper into your favorite stories with our new audiobook feature. Switch between reading and listening anytime, anywhere. - Social Media Connection: Book.io is now easier than ever to get started. Log in or create an account using your existing social media credentials.
Screenshots
Verdict
The clearest difference is review sentiment: Book.io at 97% against i2Reader Cloud's 48%. Book.io also leads on rating (4.8 vs 4.1) and in-app purchases (none vs 5). On price, ratings volume, update cadence and ads there is nothing between them.
Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS
Both are free to download. i2Reader Cloud sells 5 one-off in-app purchases. Book.io asks for nothing beyond the download.
Book.io holds the better App Store score, 4.8 against 4.1. Both are backed by a comparable volume of ratings — 74 and 58 respectively. Written reviews point the same way: 48% of i2Reader Cloud's written reviews are positive against 97% of Book.io's.
i2Reader Cloud ships an update every 3 months, Book.io every 2 months. The most recent releases landed on September 29, 2026 and September 17, 2026 respectively.
| Parameter | i2Reader Cloud | Book.io |
|---|---|---|
| Price | Free | Free |
| Rating | 4.1 (74 ratings) | 4.8 (58 ratings) — better |
| Positive reviews | 48.4% of reviews | 96.7% of reviews — better |
| Number of ratings | 74 — better | 58 |
| Update frequency | Every 3 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | Yes | No — better |
| Monetization | Free with in-app purchases | Free — better |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 15.6 — better | 16.0 |
| Further details — not scored | ||
| Size | 37 MB | 31 MB |
| Age rating | 17+ | 12+ |
| Developer | Yuriy Melyushin | Book.io, Inc |
Customer experience
i2Reader Cloud
Book.io
In-app purchases
i2Reader Cloud
- Auto-scroll$0.99
- Seamless textures$0.99
- Auto turning$0.99
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- Online translator$1.99
- Removal of limitations$3.99
Book.io
No in-app purchases









