# 车工计算器 vs iMaster

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

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

## The numbers

| Metric | 车工计算器 | iMaster |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 5 weeks | — |
| Size | 34 MB | 51 MB |
| Requires iOS | 13.0 | **12.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 12+ | 17+ |
| Developer | [钱威 武](https://appshunter.io/developer/1600415425) | [杭州物源科技有限公司](https://appshunter.io/developer/1462638601) |

## What reviewers say

### 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 |


### iMaster

[App page](https://appshunter.io/ios/app/imaster/id6747325493)

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

**In-app purchases:** none


## Frequently asked questions

### Is 车工计算器 free?

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

### Is iMaster free?

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

### Do 车工计算器 or iMaster have ads?

Neither 车工计算器 nor iMaster shows ads.

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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.*