# Zeitlog vs Calenduo

The clearest difference is update cadence: Calenduo at every 2 days against Zeitlog's every 4 weeks. 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.

Zeitlog ships an update every 4 weeks, Calenduo every 2 days. The most recent releases landed on October 6, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Zeitlog | Calenduo |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 4 weeks | **Every 2 days** |
| Size | 71 MB | 36 MB |
| Requires iOS | 16.4 | **15.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 12+ |
| Developer | [IMEOS](https://appshunter.io/developer/1249567976) | [Sebastian Britz](https://appshunter.io/developer/1763082684) |

## What reviewers say

### Zeitlog

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

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

**In-app purchases:** none


### Calenduo

[App page](https://appshunter.io/ios/app/calenduo-ai-shared-calendar/id6762887009)

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

**In-app purchases:** none


## Frequently asked questions

### Is Zeitlog free?

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

### Is Calenduo free?

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

### Do Zeitlog or Calenduo have ads?

Neither Zeitlog nor Calenduo shows ads.

### Which is updated more often, Zeitlog or Calenduo?

Zeitlog ships an update every 4 weeks, and Calenduo every 2 days. Most recently, Zeitlog was updated on October 6, 2026 and Calenduo on October 8, 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.*