# 日記と体重 vs やせるぞう

The clearest difference is price: やせるぞう at Free against 日記と体重's $2.99. 日記と体重's advantage is iOS requirement (12.0 vs 15.1). On update cadence, ads, in-app purchases and device support there is nothing between them.

やせるぞう is free to download; 日記と体重 costs $2.99 up front. 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 17, 2026 and October 9, 2026 respectively.

## The numbers

| Metric | 日記と体重 | やせるぞう |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Weekly | Weekly |
| Monetization | Free | — |
| Size | 30 MB | 29 MB |
| Requires iOS | **12.0** | 15.1 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Yuya Ohno](https://appshunter.io/developer/1757372076) | [Yuichi Kitajima](https://appshunter.io/developer/1841654164) |

## What reviewers say

### 日記と体重

[App page](https://appshunter.io/ios/app/bmi/id6544789673)

Easily log daily entries, weight, and body fat percentage with a calendar interface. Track your progress visually with customizable graphs and review past records. Stay motivated with reminders and personalize your experience with theme colors.

**Highlights:** Calendar-based logging, Weight and body fat percentage tracking, Monthly average weight display, Customizable progress graphs, Searchable diary history, Theme color customization, Recording reminders

**Features:** macOS Compatibility

**In-app purchases:** none


### やせるぞう

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

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

**In-app purchases:** none


## Frequently asked questions

### Is 日記と体重 free?

日記と体重 costs $2.99, with no in-app purchases.

### Is やせるぞう free?

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

### Do 日記と体重 or やせるぞう have ads?

Neither 日記と体重 nor やせるぞう shows ads.

### Which is updated more often, 日記と体重 or やせるぞう?

日記と体重 ships an update weekly, and やせるぞう weekly. Most recently, 日記と体重 was updated on October 17, 2026 and やせるぞう on October 9, 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.*