# 树字MES vs Three9x

The clearest difference is update cadence: 树字MES at every 3 weeks against Three9x's every 2 months. 树字MES also leads on iOS requirement (12.0 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.

树字MES ships an update every 3 weeks, Three9x every 2 months. The most recent releases landed on September 17, 2026 and September 14, 2026 respectively.

## The numbers

| Metric | 树字MES | Three9x |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 43 MB | 480 MB |
| Requires iOS | **12.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen Shuzi Information Technology Co., Ltd.](https://appshunter.io/developer/1448228124) | [THREE9X (SMC-PRIVATE) LIMITED](https://appshunter.io/developer/6782750724) |

## What reviewers say

### 树字MES

[App page](https://appshunter.io/ios/app/mes/id1576305439)

**In-app purchases:** none


### Three9x

[App page](https://appshunter.io/ios/app/three9x/id6782750722)

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

**In-app purchases:** none


## Frequently asked questions

### Is 树字MES free?

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

### Is Three9x free?

Three9x is free to download, with no in-app purchases.

### Do 树字MES or Three9x have ads?

Neither 树字MES nor Three9x shows ads.

### Which is updated more often, 树字MES or Three9x?

树字MES ships an update every 3 weeks, and Three9x every 2 months. Most recently, 树字MES was updated on September 17, 2026 and Three9x on September 14, 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.*