# STS vs 安腾云 Pro

The clearest difference is update cadence: STS at every 2 weeks against 安腾云 Pro's every 14 months. STS also leads on device support. On price, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

STS ships an update every 2 weeks, 安腾云 Pro every 14 months. The most recent releases landed on October 2, 2026 and October 11, 2026 respectively.

## The numbers

| Metric | STS | 安腾云 Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 2 weeks** | Every 14 months |
| Size | 12 MB | 38 MB |
| Requires iOS | 13.2 | **13.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [中铁工程装备集团有限公司](https://appshunter.io/developer/1447605449) | [英杰 汲](https://appshunter.io/developer/1556595901) |

## What reviewers say

### STS

[App page](https://appshunter.io/ios/app/sts-mobile/id1538528756)

**In-app purchases:** none


### 安腾云 Pro

[App page](https://appshunter.io/ios/app/pro/id6504392805)

**In-app purchases:** none


## Frequently asked questions

### Is STS free?

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

### Is 安腾云 Pro free?

安腾云 Pro is free to download, with no in-app purchases.

### Which is updated more often, STS or 安腾云 Pro?

STS ships an update every 2 weeks, and 安腾云 Pro every 14 months. Most recently, STS was updated on October 2, 2026 and 安腾云 Pro on October 11, 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.*