# O vs Ehlert.IT Authenticator

The clearest difference is update cadence: Ehlert.IT Authenticator at every 6 days against O's every 4 months. 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.

O ships an update every 4 months, Ehlert.IT Authenticator every 6 days. The most recent releases landed on October 14, 2026 and October 19, 2026 respectively.

## The numbers

| Metric | O | Ehlert.IT Authenticator |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 months | **Every 6 days** |
| Size | 43 MB | 5 MB |
| Requires iOS | **16.4** | 17.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [blassl & partner](https://appshunter.io/developer/1636450043) | [Thiemo Ehlert](https://appshunter.io/developer/1896276319) |

## What reviewers say

### O

[App page](https://appshunter.io/ios/app/o-tis-app/id1636683380)

**Features:** Vision Pro support

**In-app purchases:** none


### Ehlert.IT Authenticator

[App page](https://appshunter.io/ios/app/ehlertit-authenticator/id6766320743)

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

**In-app purchases:** none


## Frequently asked questions

### Is O free?

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

### Is Ehlert.IT Authenticator free?

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

### Do O or Ehlert.IT Authenticator have ads?

Neither O nor Ehlert.IT Authenticator shows ads.

### Which is updated more often, O or Ehlert.IT Authenticator?

O ships an update every 4 months, and Ehlert.IT Authenticator every 6 days. Most recently, O was updated on October 14, 2026 and Ehlert.IT Authenticator on October 19, 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.*