# KeyReader vs CustomBooks

The clearest difference is in-app purchases: CustomBooks at none against KeyReader's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. KeyReader sells 3 in-app purchases, starting at $2.99 per month. CustomBooks asks for nothing beyond the download.

KeyReader ships an update every 3 weeks, CustomBooks every 2 weeks. The most recent releases landed on October 7, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | KeyReader | CustomBooks |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 2 weeks** |
| Size | 7 MB | 3 MB |
| Requires iOS | 18.0 | **17.0** |
| Devices | iPhone | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Oleg Strigunov](https://appshunter.io/developer/1705947979) | [永隆 郝](https://appshunter.io/developer/6781715723) |

## What reviewers say

### KeyReader

[App page](https://appshunter.io/ios/app/keyreader/id6762510058)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlimited Reading | $2.99 | per month |
| Unlimited Reading | $19.99 | per year |
| Unlimited Reading | $49.99 | one-time |


### CustomBooks

[App page](https://appshunter.io/ios/app/custombooks/id6781718998)

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

**In-app purchases:** none


## Frequently asked questions

### Is KeyReader free?

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

### Is CustomBooks free?

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

### Do KeyReader or CustomBooks have ads?

Neither KeyReader nor CustomBooks shows ads.

### Which is updated more often, KeyReader or CustomBooks?

KeyReader ships an update every 3 weeks, and CustomBooks every 2 weeks. Most recently, KeyReader was updated on October 7, 2026 and CustomBooks on October 1, 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.*