# Chinese@OU vs Ninety9

The clearest difference is update cadence: Ninety9 at daily against Chinese@OU's every 16 months. Chinese@OU's advantage is iOS requirement (12.0 vs 18.2). On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Chinese@OU ships an update every 16 months, Ninety9 daily. The most recent releases landed on October 27, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | Chinese@OU | Ninety9 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Daily** |
| Size | 533 MB | 107 MB |
| Requires iOS | **12.0** | 18.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [The Open University](https://appshunter.io/developer/336747246) | [Mohammed Hoque](https://appshunter.io/developer/1878455221) |

## What reviewers say

### Chinese@OU

[App page](https://appshunter.io/ios/app/chineseou/id6443920274)

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

**In-app purchases:** none


### Ninety9

[App page](https://appshunter.io/ios/app/ninety9/id6759404583)

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

**In-app purchases:** none


## Frequently asked questions

### Is Chinese@OU free?

Chinese@OU is free to download, with no in-app purchases.

### Is Ninety9 free?

Ninety9 is free to download, with no in-app purchases.

### Do Chinese@OU or Ninety9 have ads?

Neither Chinese@OU nor Ninety9 shows ads.

### Which is updated more often, Chinese@OU or Ninety9?

Chinese@OU ships an update every 16 months, and Ninety9 daily. Most recently, Chinese@OU was updated on October 27, 2026 and Ninety9 on October 25, 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.*