# STS vs Kardoz

The clearest difference is iOS requirement: STS at 13.2 against Kardoz'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.

STS ships an update every 2 weeks, Kardoz fortnightly. The most recent releases landed on October 18, 2026 and October 7, 2026 respectively.

## The numbers

| Metric | STS | Kardoz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 weeks | **Fortnightly** |
| Size | 12 MB | 37 MB |
| Requires iOS | **13.2** | 15.6 |
| Devices | iPhone, iPad, iPod | 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) | [karos mohammed](https://appshunter.io/developer/1678806713) |

## What reviewers say

### STS

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

**In-app purchases:** none


### Kardoz

[App page](https://appshunter.io/ios/app/kardoz/id6757150600)

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

**In-app purchases:** none


## Frequently asked questions

### Is STS free?

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

### Is Kardoz free?

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

### Do STS or Kardoz have ads?

Neither STS nor Kardoz shows ads.

### Which is updated more often, STS or Kardoz?

STS ships an update every 2 weeks, and Kardoz fortnightly. Most recently, STS was updated on October 18, 2026 and Kardoz on October 7, 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.*