# zTMS vs 三一TMS

The clearest difference is iOS requirement: 三一TMS at 12.0 against zTMS's 15.6. 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.

zTMS ships an update monthly, 三一TMS every 3 weeks. The most recent releases landed on October 14, 2026 and October 18, 2026 respectively.

## The numbers

| Metric | zTMS | 三一TMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Size | 33 MB | 23 MB |
| Requires iOS | 15.6 | **12.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shenzhen ZKS Mobile IOT Tech Co., Ltd.](https://appshunter.io/developer/1296855170) | [三一汽车制造有限公司](https://appshunter.io/developer/1361916725) |

## What reviewers say

### zTMS

[App page](https://appshunter.io/ios/app/ztms/id1343042775)

**In-app purchases:** none


### 三一TMS

[App page](https://appshunter.io/ios/app/tms/id1671428396)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is zTMS free?

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

### Is 三一TMS free?

三一TMS is free to download, with no in-app purchases.

### Do zTMS or 三一TMS have ads?

Neither zTMS nor 三一TMS shows ads.

### Which is updated more often, zTMS or 三一TMS?

zTMS ships an update monthly, and 三一TMS every 3 weeks. Most recently, zTMS was updated on October 14, 2026 and 三一TMS on October 18, 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.*