# kerek.app vs invert

The clearest difference is update cadence: kerek.app at every 3 days against invert's fortnightly. invert's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, 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.

kerek.app ships an update every 3 days, invert fortnightly. The most recent releases landed on October 13, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | kerek.app | invert |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 3 days** | Fortnightly |
| Size | 34 MB | 58 MB |
| Requires iOS | 16.0 | **13.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 12+ | 4+ |
| Developer | [DS Systems, TOO](https://appshunter.io/developer/1101906828) | [Amir Umarov](https://appshunter.io/developer/1804342034) |

## What reviewers say

### kerek.app

[App page](https://appshunter.io/ios/app/kerekapp/id6504928611)

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

**In-app purchases:** none


### invert

[App page](https://appshunter.io/ios/app/invert/id6743755761)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is kerek.app free?

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

### Is invert free?

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

### Do kerek.app or invert have ads?

Neither kerek.app nor invert shows ads.

### Which is updated more often, kerek.app or invert?

kerek.app ships an update every 3 days, and invert fortnightly. Most recently, kerek.app was updated on October 13, 2026 and invert on October 16, 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.*