ERReader: Learn Russian
Russian words in English books
Only for iPhone
Free · In‑App Purchases · Designed for iPhone. Not verified for macOS.
iPhone
Open an English book and some of the words are already Russian.
How many is up to you: the ring turns from 0 to 100%.
At 10% every tenth word is Russian. It still reads like an ordinary
book, but every paragraph hands you a new Russian word in a context
where the meaning is obvious without a dictionary. Your brain fills in
the rest — that is how vocabulary sticks. If it does not, tap the word
to see what it replaced.
The alphabet is a setting, not a wall. Russian words can be shown
in Latin letters (krovat'), in Cyrillic (кровать), or both at once —
switch whenever you are ready, mid-page, without losing your place.
Learned a word? Remove it, and the freed percent goes to the next one.
— Your own books: EPUB, FB2, TXT
— Fully offline: the dictionary lives inside the app
— Word order never reshuffles when you change the percentage
— Proper nouns and ambiguous words are never replaced
— Themes, typefaces, size, line spacing
— No ads, no data collection
Three days free. Then ten pages a day free, or a one-time purchase —
not a subscription.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Turning a page is now animated, and you can choose which way pages move: sideways, like a paper book, or up and down, which is easier one-handed. Settings → Turning pages.
New: justified text. Settings → Type → Justify gives the page an even right edge, with hyphenation switched on alongside it so the lines do not break into gaps.
The developer, YURI KOTENIATKIN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- YURI KOTENIATKIN
- Size
- 4.7 MB
- Category
- Education
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- In-App Purchases
Yes
- Full access $4.99
- Copyright
- © 2026 Yuri Koteniatkin