# Open Working Hours vs Koku

The clearest difference is update cadence: Koku at every 3 days against Open Working Hours's weekly. Open Working Hours's advantage is iOS requirement (15.1 vs 26.4). 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.

Open Working Hours ships an update weekly, Koku every 3 days. The most recent releases landed on September 11, 2026 and July 22, 2026 respectively.

## The numbers

| Metric | Open Working Hours | Koku |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | **Every 3 days** |
| Size | 37 MB | 4 MB |
| Requires iOS | **15.1** | 26.4 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Lukas Hondrich](https://appshunter.io/developer/1854184939) | [Rodolfo Alberto Lopez Terriquez](https://appshunter.io/developer/1896502707) |

## What reviewers say

### Open Working Hours

[App page](https://appshunter.io/ios/app/open-working-hours/id6755491395)

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

**In-app purchases:** none


### Koku

[App page](https://appshunter.io/ios/app/koku-focus-timer/id6767715863)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Open Working Hours free?

Open Working Hours is free to download, with no in-app purchases.

### Is Koku free?

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

### Do Open Working Hours or Koku have ads?

Neither Open Working Hours nor Koku shows ads.

### Which is updated more often, Open Working Hours or Koku?

Open Working Hours ships an update weekly, and Koku every 3 days. Most recently, Open Working Hours was updated on September 11, 2026 and Koku on July 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.*