# One TMS vs Zeitlog

The clearest difference is update cadence: Zeitlog at every 4 weeks against One TMS's every 2 months. One TMS's advantage is iOS requirement (13.0 vs 16.4). 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.

One TMS ships an update every 2 months, Zeitlog every 4 weeks. Both last shipped on August 22, 2026.

## The numbers

| Metric | One TMS | Zeitlog |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 4 weeks** |
| Size | 179 MB | 71 MB |
| Requires iOS | **13.0** | 16.4 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [TMS Trademarketing Service GmbH](https://appshunter.io/developer/1105841629) | [IMEOS](https://appshunter.io/developer/1249567976) |

## What reviewers say

### One TMS

[App page](https://appshunter.io/ios/app/one-tms/id1470225261)

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

**In-app purchases:** none


### Zeitlog

[App page](https://appshunter.io/ios/app/zeitlog/id1670687082)

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

**In-app purchases:** none


## Frequently asked questions

### Is One TMS free?

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

### Is Zeitlog free?

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

### Do One TMS or Zeitlog have ads?

Neither One TMS nor Zeitlog shows ads.

### Which is updated more often, One TMS or Zeitlog?

One TMS ships an update every 2 months, and Zeitlog every 4 weeks. Most recently, One TMS was updated on August 22, 2026 and Zeitlog on August 22, 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.*