# TrainTT vs U

The clearest difference is in-app purchases: TrainTT at none against U's 3. TrainTT also leads on ads (none vs shown) and update cadence (every 3 days vs weekly). On price, device support and iOS requirement there is nothing between them.

Both are free to download. U sells 3 in-app purchases, starting at $1.99 per month. TrainTT asks for nothing beyond the download.

TrainTT ships an update every 3 days, U weekly. The most recent releases landed on September 14, 2026 and September 9, 2026 respectively.

## The numbers

| Metric | TrainTT | U |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 3 days** | Weekly |
| Size | 49 MB | 94 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 12+ |
| Developer | [Qian Yun Network Service Co., Ltd.](https://appshunter.io/developer/1567568557) | [HAIK](https://appshunter.io/developer/1780180781) |

## What reviewers say

### TrainTT

[App page](https://appshunter.io/ios/app/traintt/id1597479690)

**Features:** macOS Compatibility

**In-app purchases:** none


### U

[App page](https://appshunter.io/ios/app/uuchat/id6739705943)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 感情アイコン追加 スタンダードプラン - 1か月 | $1.99 | per month |
| 感情アイコン追加 プレミアムプラン - 1か月 | $3.99 | per month |
| Generate an avatar | $0.99 | one-time |


## Frequently asked questions

### Is TrainTT free?

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

### Is U free?

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

### Do TrainTT or U have ads?

U shows ads; TrainTT does not.

### Which is updated more often, TrainTT or U?

TrainTT ships an update every 3 days, and U weekly. Most recently, TrainTT was updated on September 14, 2026 and U on September 9, 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.*