Polish21 vs EPUB Reader
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Polish21
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Master Polish in 21 days with Polish21! Learn Polish through a structured 21-day course designed for real-world conversations. Practice with Speech recognition, track your progress, get advice from a teacher, and learn while driving your car. All features are unlocked for free when using Settings, Language Ukrainian.
EPUB Reader
This app helps you learn languages by reading books with side-by-side translations. You can tap to translate words or sentences, save vocabulary, and customize your reading experience. It offers a selection of free classic reads and the option to import your own EPUB and TXT files.
- Dual-text translation
- Tap to translate words/sentences
- Save vocabulary with context
- Import EPUB and TXT files
- Customizable reading themes and fonts
- Offline translation after initial download
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Duotext is a book reader with subtitles: the original line on top, its translation right underneath — with the same on/off toggle you know from video players. 16 CLASSIC READS IN YOUR LIBRARY • Three complete starter texts, free to read. • The English language setting starts with three French fables by Jean de La Fontaine, with ready-to-read English translations. • Other language settings start with English stories by Kate Chopin, O. Henry and Oscar Wilde. • Thirteen more texts with Pro: French stories by Maupassant and fables by La Fontaine for the English language setting; English stories, including four by Saki, for other settings. TRANSLATION THE WAY YOU WANT IT • Tap to translate — free, in every book: touch the mark after a sentence and its translation appears • Always-on translation under the text, with no tapping at all — with Pro • Choose how the text is split: by line, by sentence, or by paragraph — with Pro • Tap a single word to see what it means in that exact sentence BUILD VOCABULARY FROM REAL BOOKS • Press and hold a sentence to save a word together with the context you met it in • Free: up to 20 saved words. Pro: an unlimited dictionary BRING YOUR OWN BOOKS — WITH PRO • Import EPUB and TXT files • Paste any text • Save an article from the web by link A READER FIRST • Six reading themes, serif, sans serif and rounded fonts, adjustable type size — all free • Covers, reading progress, and your place in the book • Your books stay on your device HOW TRANSLATION WORKS Duotext uses the translation built into iOS, so text is translated on your iPhone. The first time you use a language pair, iOS downloads that language model, which needs an internet connection; after that, translation runs on your device. You can translate into the languages your device supports for translation. No account, no sign-up. WHAT IS FREE AND WHAT IS PRO Free: 3 complete stories, tap to translate in any book, up to 20 saved words, and every theme, font and type size. Duotext Pro adds: 13 more stories, always-on translation under every line, the by line / by sentence / by paragraph layouts, importing your own EPUB and TXT files, pasted text and links, and an unlimited dictionary. SUBSCRIPTION AND PURCHASE Duotext Pro is available as a yearly subscription for US$14.99 with a 3-day free trial, or as a one-time Lifetime purchase for US$24.99. • Payment is charged to your Apple Account at confirmation of purchase. • The subscription renews automatically unless auto-renewal is turned off at least 24 hours before the end of the current period. Your Apple Account is charged for renewal within 24 hours before the end of the current period. • You can manage your subscription and turn off auto-renewal in your Apple Account settings. • Any unused portion of a free trial period is forfeited when you purchase a subscription. • Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ • Privacy Policy: https://artsaverin-star.github.io/legal/duotext/privacy.html
Screenshots
Verdict
Polish21 and EPUB Reader are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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. Polish21 sells 1 one-off in-app purchase and EPUB Reader sells 2 in-app purchases, starting at $14.99 per year. Whichever you choose, the download price is not the number that matters.
Polish21 ships an update every 5 days, EPUB Reader weekly. Both last shipped on September 24, 2026.
| Parameter | Polish21 | EPUB Reader |
|---|---|---|
| Price | Free | Free |
| Rating | — | 5.0 (1 ratings) — better |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | — | 1 — better |
| Update frequency | Every 5 days — better | Weekly |
| Ads | No | No |
| In-app purchases | Yes | Yes |
| Monetization | — | Freemium |
| Devices | iPhone, iPad — better | iPhone |
| Requires iOS | 17.6 — better | 18.0 |
| Further details — not scored | ||
| Size | 474 MB | 16 MB |
| Age rating | 4+ | 12+ |
| Developer | OLE PETTER HAUGEN | Iaroslav Saverin |
In-app purchases
Polish21
- Polish21 Pro$19.99
EPUB Reader
- Yearly3 Days trial$14.991 Year
- Lifetime$24.99





