# Sirio2 vs ATF Check

The clearest difference is update cadence: ATF Check at every 5 weeks against Sirio2's every 16 months. ATF Check also leads on iOS requirement (9.0 vs 12.4). 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.

Sirio2 ships an update every 16 months, ATF Check every 5 weeks. Both last shipped on October 26, 2026.

## The numbers

| Metric | Sirio2 | ATF Check |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 5 weeks** |
| Size | 106 MB | 44 MB |
| Requires iOS | 12.4 | **9.0** |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [NewPhone GmbH](https://appshunter.io/developer/1003721659) | [MAHLE Aftermarket Italy S.p.A.](https://appshunter.io/developer/1321815882) |

## What reviewers say

### Sirio2

[App page](https://appshunter.io/ios/app/sirio2/id1003721660)

**Features:** macOS Compatibility

**In-app purchases:** none


### ATF Check

[App page](https://appshunter.io/ios/app/atf-check-up/id1331490742)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sirio2 free?

Sirio2 is free to download, with no in-app purchases.

### Is ATF Check free?

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

### Do Sirio2 or ATF Check have ads?

Neither Sirio2 nor ATF Check shows ads.

### Which is updated more often, Sirio2 or ATF Check?

Sirio2 ships an update every 16 months, and ATF Check every 5 weeks. Most recently, Sirio2 was updated on October 26, 2026 and ATF Check on October 26, 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.*