# ChildClock vs U

The clearest difference is update cadence: ChildClock at every 4 days against U's every 3 weeks. ChildClock also leads on iOS requirement (11.0 vs 15.6). 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.

ChildClock ships an update every 4 days, U every 3 weeks. The most recent releases landed on October 7, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | ChildClock | U |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 4 days** | Every 3 weeks |
| Size | 18 MB | 113 MB |
| Requires iOS | **11.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [ADSMART TECHNOLOGY LIMITED](https://appshunter.io/developer/1217365227) | [a2softin](https://appshunter.io/developer/1133492162) |

## What reviewers say

### ChildClock

[App page](https://appshunter.io/ios/app/childclock/id1542564370)

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

**In-app purchases:** none


### U

[App page](https://appshunter.io/ios/app/u-prox-united/id6739584210)

**In-app purchases:** none


## Frequently asked questions

### Is ChildClock free?

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

### Is U free?

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

### Do ChildClock or U have ads?

Neither ChildClock nor U shows ads.

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

ChildClock ships an update every 4 days, and U every 3 weeks. Most recently, ChildClock was updated on October 7, 2026 and U on October 17, 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.*