# KeyIdentity Authenticator vs Atemschutz

The clearest difference is update cadence: KeyIdentity Authenticator at every 8 months against Atemschutz's every 21 months. KeyIdentity Authenticator also leads on device support and iOS requirement (9.0 vs 15.6). On price 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.

KeyIdentity Authenticator ships an update every 8 months, Atemschutz every 21 months. The most recent releases landed on October 29, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | KeyIdentity Authenticator | Atemschutz |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | — |
| Update frequency | **Every 8 months** | Every 21 months |
| Size | 37 MB | 77 MB |
| Requires iOS | **9.0** | 15.6 |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 17+ |
| Developer | [KeyIdentity GmbH](https://appshunter.io/developer/571941070) | [Boris Klabazna](https://appshunter.io/developer/1642174946) |

## What reviewers say

### KeyIdentity Authenticator

[App page](https://appshunter.io/ios/app/keyidentity-authenticator/id1156019084)

**Features:** macOS Compatibility

**In-app purchases:** none


### Atemschutz

[App page](https://appshunter.io/ios/app/atemschutz-tagebuch/id6596770728)

**In-app purchases:** none


## Frequently asked questions

### Is KeyIdentity Authenticator free?

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

### Is Atemschutz free?

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

### Which is updated more often, KeyIdentity Authenticator or Atemschutz?

KeyIdentity Authenticator ships an update every 8 months, and Atemschutz every 21 months. Most recently, KeyIdentity Authenticator was updated on October 29, 2026 and Atemschutz on October 14, 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.*