# Calmer OS vs Centering

Calmer OS and Centering are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Calmer OS | Centering |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | — |
| Size | 12 MB | 4 MB |
| Requires iOS | **18.0** | 18.2 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Petr Betak](https://appshunter.io/developer/1775162907) | [Hermann Hampel](https://appshunter.io/developer/1805937427) |

## What reviewers say

### Calmer OS

[App page](https://appshunter.io/ios/app/calmer-os/id6737633514)

**Features:** macOS Compatibility

**In-app purchases:** none


### Centering

[App page](https://appshunter.io/ios/app/centering/id6744073587)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Calmer OS free?

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

### Is Centering free?

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

### Do Calmer OS or Centering have ads?

Neither Calmer OS nor Centering shows ads.

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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.*