# 知言阅读 vs KeyReader

The clearest difference is in-app purchases: 知言阅读 at none against KeyReader's 3. 知言阅读 also leads on device support (3 vs 1) and iOS requirement (13.0 vs 18.0). On price and ads there is nothing between them.

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

## The numbers

| Metric | 知言阅读 | KeyReader |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | — | Every 3 weeks |
| Size | 44 MB | 7 MB |
| Requires iOS | **13.0** | 18.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [勤 袁](https://appshunter.io/developer/1679888858) | [Oleg Strigunov](https://appshunter.io/developer/1705947979) |

## What reviewers say

### 知言阅读

[App page](https://appshunter.io/ios/app/id6751031106)

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

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 知言阅读 free?

知言阅读 is free to download, with no in-app purchases.

### Is KeyReader free?

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

### Do 知言阅读 or KeyReader have ads?

Neither 知言阅读 nor KeyReader shows ads.

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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.*