# やせるぞう vs Unki

The clearest difference is iOS requirement: やせるぞう at 15.1 against Unki's 17.0. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 9, 2026 and October 10, 2026 respectively.

## The numbers

| Metric | やせるぞう | Unki |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Size | 29 MB | 13 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Yuichi Kitajima](https://appshunter.io/developer/1841654164) | [Daisaku Mori](https://appshunter.io/developer/1892935206) |

## What reviewers say

### やせるぞう

[App page](https://appshunter.io/ios/app/id6762079865)

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

**In-app purchases:** none


### Unki

[App page](https://appshunter.io/ios/app/unki-bowel-tracker/id6777927621)

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

**In-app purchases:** none


## Frequently asked questions

### Is やせるぞう free?

やせるぞう is free to download, with no in-app purchases.

### Is Unki free?

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

### Do やせるぞう or Unki have ads?

Neither やせるぞう nor Unki shows ads.

### Which is updated more often, やせるぞう or Unki?

やせるぞう ships an update weekly, and Unki weekly. Most recently, やせるぞう was updated on October 9, 2026 and Unki on October 10, 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.*