# Kaizen vs Study Chicken

The clearest difference is in-app purchases: Study Chicken at none against Kaizen's 2. Kaizen's advantage is iOS requirement (16.4 vs 18.2). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Kaizen sells 2 in-app purchases, starting at $3.99 per month. Study Chicken asks for nothing beyond the download.

Kaizen ships an update every 2 weeks, Study Chicken every 3 weeks. The most recent releases landed on October 1, 2026 and October 6, 2026 respectively.

## The numbers

| Metric | Kaizen | Study Chicken |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 2 weeks** | Every 3 weeks |
| Size | 68 MB | 5 MB |
| Requires iOS | **16.4** | 18.2 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [MK Development](https://appshunter.io/developer/1853083060) | [Tinkercademy Community Showcase](https://appshunter.io/developer/1436937929) |

## What reviewers say

### Kaizen

[App page](https://appshunter.io/ios/app/kaizen-focus-and-study-timer/id6755314708)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Premium (monthly) | $3.99 | per month |
| Premium (yearly) | $44.99 | per year |


### Study Chicken

[App page](https://appshunter.io/ios/app/study-chicken-your-study-pet/id6755617198)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Kaizen free?

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

### Is Study Chicken free?

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

### Do Kaizen or Study Chicken have ads?

Neither Kaizen nor Study Chicken shows ads.

### Which is updated more often, Kaizen or Study Chicken?

Kaizen ships an update every 2 weeks, and Study Chicken every 3 weeks. Most recently, Kaizen was updated on October 1, 2026 and Study Chicken on October 6, 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.*