# OneBook vs HeyReader

The clearest difference is in-app purchases: OneBook at none against HeyReader's 2. OneBook also leads on ratings volume (54 vs 3) and iOS requirement (15.0 vs 18.0). HeyReader's advantage is update cadence (every 3 days vs every 9 days). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. HeyReader sells 2 in-app purchases, starting at $4.99 per month. OneBook asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 5.0 for OneBook against 5.0 for HeyReader. That said, the two scores are not equally well evidenced: OneBook has 54 ratings behind it against 3, so its average is the more settled of the two. Written reviews are what separate them: 97% of OneBook's written reviews are positive against 100% of HeyReader's.

OneBook ships an update every 9 days, HeyReader every 3 days. The most recent releases landed on September 22, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | OneBook | HeyReader |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [5.0 (54 ratings)](https://appshunter.io/ios/app/onebook-learnmultilingual-hub/id6749743594/reviews) | [5.0 (3 ratings)](https://appshunter.io/ios/app/heyreader-learn-languages/id6757210312/reviews) |
| Number of ratings | **54** | 3 |
| Positive reviews | 96.7% of reviews | **100.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 9 days | **Every 3 days** |
| Monetization | Free | Free |
| Size | 222 MB | 13 MB |
| Requires iOS | **15.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [翊 林](https://appshunter.io/developer/1803147015) | [Shandong Linhu Cultural Development Co., Ltd.](https://appshunter.io/developer/1845287380) |

## What reviewers say

### OneBook

[App page](https://appshunter.io/ios/app/onebook-learnmultilingual-hub/id6749743594)

This app helps you read physical books by scanning pages to provide definitions and pronunciations without an internet connection. It preserves the original layout for a comfortable reading experience, free from glare.

**Highlights:** Scan physical books, Offline word lookup, Hear pronunciations, Preserve original layout, Glare-free reading

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### HeyReader

[App page](https://appshunter.io/ios/app/heyreader-learn-languages/id6757210312)

Learn languages by reading real-world content. Subscribe to RSS feeds or import your own eBooks to practice vocabulary, understand complex sentences, and translate as you read. Enjoy a distraction-free, customizable reading experience.

**Highlights:** RSS feed subscriptions, Import PDF & EPUB books, Vocabulary highlighting & saving, Smart sentence splitting, Sentence & paragraph translation, Adjustable fonts & night mode

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| HeyReader Pro | $4.99 | per month |
| HeyReader Pro Max | $9.99 | per month |


## Frequently asked questions

### Is OneBook free?

OneBook is free to download, with no in-app purchases.

### Is HeyReader free?

HeyReader is free to download, with in-app purchases available.

### Which has better reviews, OneBook or HeyReader?

OneBook and HeyReader are both rated 5.0 out of 5 on the App Store, from 54 and 3 ratings respectively.

### Do OneBook or HeyReader have ads?

Neither OneBook nor HeyReader shows ads.

### Which is updated more often, OneBook or HeyReader?

OneBook ships an update every 9 days, and HeyReader every 3 days. Most recently, OneBook was updated on September 22, 2026 and HeyReader on September 14, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*