Parallel Books vs ReadFun App
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Parallel Books
Learn a new language by reading books with side-by-side translations. This app keeps translations synchronized as you read, allowing for full immersion. Easily switch between display modes and add notes for a personalized learning experience.
- Dual language display
- Synchronized translations
- Adjustable display modes
- Searchable notes
- Day/night themes
- Highlighting
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Become fluent in a new language. Read a book in your new tongue while having a parallel copy in your native language handy for reference. Now thanks to Parallel Books, this technique is available on iPad, iPhone and iPod touch. Translations will automatically stay in sync, leaving you free to be immersed in the words on the page. Reading a book in two different languages at the same time has never been easier! - Designed for people learning a new language. - Displays a book simultaneously in two different languages. - Translations stay in sync as you read. - Stretchy, “chewing gum" overlay visually connects parallel content. - Chewing gum overlay can be hidden. - Translations can be displayed in two columns on the screen, or each translation can fill an entire screen. - Continuously scrolls or pages through content without needing to change mode. - Tapping on a paragraph shows the translation of that paragraph. - Double tapping hides tool bars, giving more space. - Multicolored highlights and searchable notes can be added. - Includes day and night themes. - Currently books are available in English, German, French, Spanish, Portuguese, Russian, Italian, Dutch, Swedish, Esperanto, Korean, Chinese, Arabic plus more. - Some books include multiple translations in the same language; ideal for literature and translation students. - Parallel Books is in development for other platforms. - New books are being added all the time. - All books are currently FREE.
ReadFun App
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ReadFun is an EPUB reader built for focused English reading. It brings reading, word lookup, translation, and study notes together in one clean experience. IMMERSIVE READING • Import your own EPUB files from Files • Download selected public-domain English classics from the Store • Customize fonts, text size, line spacing, paragraph spacing, and reading themes • Resume where you left off and navigate with the table of contents UNDERSTAND AS YOU READ • Tap a word to see its meaning in context • Double-tap a sentence for sentence translation • Choose offline, online, or AI-assisted translation • Use AI mode for contextual explanations and grammar analysis SAVE AND REVIEW • Save useful words and sentences while reading • Review saved items in Notes • Manage imported and downloaded books in your Library Book import and core reading features are available to everyone. ReadFun Plus and ReadFun Pro expand online translation and AI explanation allowances. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://huoshenwenhua.github.io/readfun-legal/privacy.html
Screenshots
Verdict
The clearest difference is in-app purchases: Parallel Books at none against ReadFun App's 4. On price, ads, device support and iOS requirement 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. ReadFun App sells 4 in-app purchases, starting at $2.49 per month. Parallel Books asks for nothing beyond the download.
| Parameter | Parallel Books | ReadFun App |
|---|---|---|
| Price | Free | Free |
| Rating | 5.0 (1 ratings) — better | — |
| Positive reviews | 40.0% of reviews | — |
| Number of ratings | 1 — better | — |
| Update frequency | Every 3 months | — |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Free | — |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.5 — better |
| Further details — not scored | ||
| Size | 2 MB | 622 MB |
| Age rating | 12+ | 12+ |
| Developer | High Tea IT Limited | 泳枚 吴 |
In-app purchases
Parallel Books
No in-app purchases
ReadFun App
- ReadFun Plus Monthly$2.491 Month
- ReadFun Pro Monthly$4.991 Month
- ReadFun Plus Yearly$19.991 Year
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- ReadFun Pro Yearly$39.991 Year









