# Yimu vs WaterTesting

The clearest difference is iOS requirement: Yimu at 12.0 against WaterTesting's 14.0. On price, update cadence, ads and in-app purchases there is nothing between them.

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

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 22, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Yimu | WaterTesting |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Size | 97 MB | 16 MB |
| Requires iOS | **12.0** | 14.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 17+ | 17+ |
| Developer | [Ecomo Inc](https://appshunter.io/developer/1193093389) | [Shanghai Ruosull Technology Co., Ltd](https://appshunter.io/developer/1735275002) |

## What reviewers say

### Yimu

[App page](https://appshunter.io/ios/app/yimu/id1193093390)

**Features:** macOS Compatibility

**In-app purchases:** none


### WaterTesting

[App page](https://appshunter.io/ios/app/watertesting/id6479241037)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Yimu free?

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

### Is WaterTesting free?

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

### Do Yimu or WaterTesting have ads?

Neither Yimu nor WaterTesting shows ads.

### Which is updated more often, Yimu or WaterTesting?

Yimu ships an update every 3 weeks, and WaterTesting every 3 weeks. Most recently, Yimu was updated on September 22, 2026 and WaterTesting on September 12, 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.*