# Sirio2 vs Mark That

The clearest difference is update cadence: Mark That at every 5 days against Sirio2's every 16 months. Sirio2's advantage is iOS requirement (12.4 vs 16.0). 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, Mark That every 5 days. The most recent releases landed on October 2, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | Sirio2 | Mark That |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 16 months | **Every 5 days** |
| Size | 106 MB | 1 MB |
| Requires iOS | **12.4** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [NewPhone GmbH](https://appshunter.io/developer/1003721659) | [Ron Srebro](https://appshunter.io/developer/1249765439) |

## What reviewers say

### Sirio2

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

**Features:** macOS Compatibility

**In-app purchases:** none


### Mark That

[App page](https://appshunter.io/ios/app/mark-that/id1658183260)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Sirio2 free?

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

### Is Mark That free?

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

### Do Sirio2 or Mark That have ads?

Neither Sirio2 nor Mark That shows ads.

### Which is updated more often, Sirio2 or Mark That?

Sirio2 ships an update every 16 months, and Mark That every 5 days. Most recently, Sirio2 was updated on October 2, 2026 and Mark That on October 9, 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.*