# PTM工程全要素计量 vs 爱车车管

The clearest difference is iOS requirement: PTM工程全要素计量 at 9.0 against 爱车车管's 12.0. 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.

PTM工程全要素计量 ships an update every 2 weeks, 爱车车管 fortnightly. The most recent releases landed on September 17, 2026 and August 31, 2026 respectively.

## The numbers

| Metric | PTM工程全要素计量 | 爱车车管 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Fortnightly |
| Size | 84 MB | 82 MB |
| Requires iOS | **9.0** | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [太原市华森伟业科技发展有限公司](https://appshunter.io/developer/991758164) | [Beijing Haoren Haoche Technology Co., Ltd.](https://appshunter.io/developer/1709414464) |

## What reviewers say

### PTM工程全要素计量

[App page](https://appshunter.io/ios/app/ptm/id1492843469)

**Features:** macOS Compatibility

**In-app purchases:** none


### 爱车车管

[App page](https://appshunter.io/ios/app/id6752467372)

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

**In-app purchases:** none


## Frequently asked questions

### Is PTM工程全要素计量 free?

PTM工程全要素计量 is free to download, with no in-app purchases.

### Is 爱车车管 free?

爱车车管 is free to download, with no in-app purchases.

### Do PTM工程全要素计量 or 爱车车管 have ads?

Neither PTM工程全要素计量 nor 爱车车管 shows ads.

### Which is updated more often, PTM工程全要素计量 or 爱车车管?

PTM工程全要素计量 ships an update every 2 weeks, and 爱车车管 fortnightly. Most recently, PTM工程全要素计量 was updated on September 17, 2026 and 爱车车管 on August 31, 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.*