# SimTunnel Lite vs STS2

The clearest difference is update cadence: STS2 at every 2 months against SimTunnel Lite's every 39 months. STS2 also leads on iOS requirement (13.0 vs 15.6). 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.

SimTunnel Lite ships an update every 39 months, STS2 every 2 months. The most recent releases landed on October 12, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | SimTunnel Lite | STS2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 39 months | **Every 2 months** |
| Size | 5 MB | 76 MB |
| Requires iOS | 15.6 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Roozbeh Geraili Mikola](https://appshunter.io/developer/1403201499) | [中铁工程装备集团有限公司](https://appshunter.io/developer/1447605449) |

## What reviewers say

### SimTunnel Lite

[App page](https://appshunter.io/ios/app/simtunnel-lite/id1494413647)

**In-app purchases:** none


### STS2

[App page](https://appshunter.io/ios/app/sts2/id6444602139)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is SimTunnel Lite free?

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

### Is STS2 free?

STS2 is free to download, with no in-app purchases.

### Do SimTunnel Lite or STS2 have ads?

Neither SimTunnel Lite nor STS2 shows ads.

### Which is updated more often, SimTunnel Lite or STS2?

SimTunnel Lite ships an update every 39 months, and STS2 every 2 months. Most recently, SimTunnel Lite was updated on October 12, 2026 and STS2 on October 8, 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.*