# 树字MES vs 车工计算器

The clearest difference is in-app purchases: 树字MES at none against 车工计算器's 3. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. 车工计算器 sells 3 one-off in-app purchases. 树字MES asks for nothing beyond the download.

树字MES ships an update every 3 weeks, 车工计算器 every 5 weeks. The most recent releases landed on October 4, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 树字MES | 车工计算器 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 5 weeks |
| Size | 43 MB | 34 MB |
| Requires iOS | **12.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 12+ |
| Developer | [Shenzhen Shuzi Information Technology Co., Ltd.](https://appshunter.io/developer/1448228124) | [钱威 武](https://appshunter.io/developer/1600415425) |

## What reviewers say

### 树字MES

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

**In-app purchases:** none


### 车工计算器

[App page](https://appshunter.io/ios/app/id1616124777)

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 一年会员 | $8.99 | one-time |
| 二年会员 | $14.99 | one-time |
| 三年会员 | $19.99 | one-time |


## Frequently asked questions

### Is 树字MES free?

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

### Is 车工计算器 free?

车工计算器 is free to download, with in-app purchases available.

### Do 树字MES or 车工计算器 have ads?

Neither 树字MES nor 车工计算器 shows ads.

### Which is updated more often, 树字MES or 车工计算器?

树字MES ships an update every 3 weeks, and 车工计算器 every 5 weeks. Most recently, 树字MES was updated on October 4, 2026 and 车工计算器 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.*