# 三一TMS vs TRMS

The clearest difference is update cadence: 三一TMS at every 3 weeks against TRMS's every 2 months. 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.

三一TMS ships an update every 3 weeks, TRMS every 2 months. The most recent releases landed on November 3, 2026 and November 12, 2026 respectively.

## The numbers

| Metric | 三一TMS | TRMS |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Size | 23 MB | 63 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [三一汽车制造有限公司](https://appshunter.io/developer/1361916725) | [上海嘀友网络科技有限公司](https://appshunter.io/developer/1087699404) |

## What reviewers say

### 三一TMS

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

**Features:** macOS Compatibility

**In-app purchases:** none


### TRMS

[App page](https://appshunter.io/ios/app/trms/id6446394584)

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

**In-app purchases:** none


## Frequently asked questions

### Is 三一TMS free?

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

### Is TRMS free?

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

### Do 三一TMS or TRMS have ads?

Neither 三一TMS nor TRMS shows ads.

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

三一TMS ships an update every 3 weeks, and TRMS every 2 months. Most recently, 三一TMS was updated on November 3, 2026 and TRMS on November 12, 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.*