# Koku vs ZenFocus

The clearest difference is in-app purchases: Koku at none against ZenFocus's 4. ZenFocus's advantage is iOS requirement (15.6 vs 26.4). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. ZenFocus sells 4 in-app purchases, starting at $1.99 per month. Koku asks for nothing beyond the download.

Koku ships an update every 3 days, ZenFocus every 4 days. The most recent releases landed on October 11, 2026 and October 3, 2026 respectively.

## The numbers

| Metric | Koku | ZenFocus |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/koku-focus-timer/id6767715863/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 days** | Every 4 days |
| Monetization | Free | — |
| Size | 10 MB | 62 MB |
| Requires iOS | 26.4 | **15.6** |
| Devices | iPhone, Apple Watch | **iPhone, iPod, Apple Watch** |
| Age rating | 4+ | 4+ |
| Developer | [Rodolfo Alberto Lopez Terriquez](https://appshunter.io/developer/1896502707) | [SUHEE BYUN](https://appshunter.io/developer/6775685890) |

## What reviewers say

### Koku

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

This app helps you focus on tasks with customizable work and rest intervals. It offers a simple, distraction-free interface and integrates with your home screen and Apple Watch for easy access and control. Enjoy deep work without accounts, streaks, or subscriptions.

**Highlights:** Customizable focus and rest sessions, Classic Pomodoro rhythm option, Home Screen widget for quick access, Live Activities on lock screen, Apple Watch companion app, Minimalist, distraction-free design

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

**In-app purchases:** none


### ZenFocus

[App page](https://appshunter.io/ios/app/zenfocus-true-study-time/id6775685888)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 찐공 베이직 | $1.99 | per month |
| 찐공 프리미엄 | $2.99 | per month |
| 찐공 베이직 | $17.99 | per year |
| 찐공 프리미엄 | $29.99 | per year |


## Frequently asked questions

### Is Koku free?

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

### Is ZenFocus free?

ZenFocus is free to download, with in-app purchases available.

### Do Koku or ZenFocus have ads?

Neither Koku nor ZenFocus shows ads.

### Which is updated more often, Koku or ZenFocus?

Koku ships an update every 3 days, and ZenFocus every 4 days. Most recently, Koku was updated on October 11, 2026 and ZenFocus on October 3, 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.*