# モグダイエット vs トレ爺

The clearest difference is in-app purchases: トレ爺 at none against モグダイエット's 4. トレ爺 also leads on iOS requirement (13.0 vs 15.1). モグダイエット's advantage is update cadence (every 5 days vs fortnightly). On price, ads and device support there is nothing between them.

Both are free to download. モグダイエット sells 4 in-app purchases, starting at $2.99 per month. トレ爺 asks for nothing beyond the download.

モグダイエット ships an update every 5 days, トレ爺 fortnightly. The most recent releases landed on October 25, 2026 and October 15, 2026 respectively.

## The numbers

| Metric | モグダイエット | トレ爺 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 5 days** | Fortnightly |
| Size | 102 MB | 2 MB |
| Requires iOS | 15.1 | **13.0** |
| Devices | iPhone, iPod | iPhone, iPod |
| Age rating | 9+ | 4+ |
| Developer | [kim dongsu](https://appshunter.io/developer/1893497771) | [Mimi Okumura](https://appshunter.io/developer/6788955622) |

## What reviewers say

### モグダイエット

[App page](https://appshunter.io/ios/app/pfc/id6762236486)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| モグダイエット 月額プラン | $2.99 | per month |
| モグダイエット 週額プラン | $2.99 | per 7 days |
| モグダイエット 年額プラン | $29.99 | per year |
| 特別オファー | $29.99 | per year |


### トレ爺

[App page](https://appshunter.io/ios/app/id6789932214)

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

**In-app purchases:** none


## Frequently asked questions

### Is モグダイエット free?

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

### Is トレ爺 free?

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

### Do モグダイエット or トレ爺 have ads?

Neither モグダイエット nor トレ爺 shows ads.

### Which is updated more often, モグダイエット or トレ爺?

モグダイエット ships an update every 5 days, and トレ爺 fortnightly. Most recently, モグダイエット was updated on October 25, 2026 and トレ爺 on October 15, 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.*