# ダイエットン vs Let's

The clearest difference is in-app purchases: Let's at none against ダイエットン's 1. ダイエットン's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 16.0). On price, update cadence and ads there is nothing between them.

Both are free to download. ダイエットン sells 1 one-off in-app purchase. Let's asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 3 weeks. The most recent releases landed on September 10, 2026 and September 11, 2026 respectively.

## The numbers

| Metric | ダイエットン | Let's |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/id1594766413/reviews)** | — |
| Number of ratings | **5** | — |
| Positive reviews | 88.9% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | Every 3 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 81 MB | 15 MB |
| Requires iOS | **13.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 9+ | 4+ |
| Developer | [NAKASHIN, K.K.](https://appshunter.io/developer/1554813140) | [jinsei shima](https://appshunter.io/developer/1168906089) |

## What reviewers say

### ダイエットン

[App page](https://appshunter.io/ios/app/id1594766413)

This app combines weight and body fat percentage tracking with a cute piglet raising game. Achieve your goals to evolve your character, defeat calorie monsters, and build healthy habits. Share your progress with friends and stay motivated with inspirational quotes.

**Highlights:** Weight and body fat percentage tracking, Virtual piglet evolution game, Selectable goal modes (weight or body fat), Progress visualization with graphs, Daily habit tracking, Motivational quotes, Social sharing of achievements

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアム版のご購入 | $2.99 | one-time |


### Let's

[App page](https://appshunter.io/ios/app/lets-a-diet-app/id1661990478)

**In-app purchases:** none


## Frequently asked questions

### Is ダイエットン free?

ダイエットン is free to download, with in-app purchases available.

### Is Let's free?

Let's is free to download, with no in-app purchases.

### Do ダイエットン or Let's have ads?

Neither ダイエットン nor Let's shows ads.

### Which is updated more often, ダイエットン or Let's?

ダイエットン ships an update every 3 weeks, and Let's every 3 weeks. Most recently, ダイエットン was updated on September 10, 2026 and Let's on September 11, 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.*