# O3 Easy vs Dieter Clock

The clearest difference is update cadence: Dieter Clock at every 3 weeks against O3 Easy's every 3 months. O3 Easy's advantage is iOS requirement (11.0 vs 17.0). 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.

O3 Easy ships an update every 3 months, Dieter Clock every 3 weeks. The most recent releases landed on October 20, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | O3 Easy | Dieter Clock |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 3 weeks** |
| Monetization | Free | — |
| Size | 31 MB | 5 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | iPhone, iPad, iPod | **iPhone, iPad, Mac, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [MAHLE Aftermarket Italy S.p.A.](https://appshunter.io/developer/1321815882) | [Oguzhan Bilgin](https://appshunter.io/developer/1848626364) |

## What reviewers say

### O3 Easy

[App page](https://appshunter.io/ios/app/o3-easy/id1512726279)

Control and monitor your ozone generator remotely. Generate detailed reports of its processes and send them via email as PDF files. This app helps you manage your equipment efficiently.

**Highlights:** Remote ozone generator management, Process monitoring, Report generation, PDF report export, Email report sending

**Features:** macOS Compatibility

**In-app purchases:** none


### Dieter Clock

[App page](https://appshunter.io/ios/app/dieter-clock/id6754521171)

**In-app purchases:** none


## Frequently asked questions

### Is O3 Easy free?

O3 Easy is free to download, with no in-app purchases.

### Is Dieter Clock free?

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

### Do O3 Easy or Dieter Clock have ads?

Neither O3 Easy nor Dieter Clock shows ads.

### Which is updated more often, O3 Easy or Dieter Clock?

O3 Easy ships an update every 3 months, and Dieter Clock every 3 weeks. Most recently, O3 Easy was updated on October 20, 2026 and Dieter Clock 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.*