# つみ筋 vs Muscle Stamp

The clearest difference is ads: Muscle Stamp at none against つみ筋's shown. つみ筋's advantage is device support (3 vs 1) and iOS requirement (15.1 vs 17.0). On price, update cadence 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 every 4 days. The most recent releases landed on October 6, 2026 and October 14, 2026 respectively.

## The numbers

| Metric | つみ筋 | Muscle Stamp |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/muscle-stamp/id6780130811/reviews)** |
| Number of ratings | — | **1** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 4 days | Every 4 days |
| Monetization | — | Free |
| Size | 79 MB | 42 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Yuta Yoshinaga](https://appshunter.io/developer/1868048345) | [Kazuki Ohya](https://appshunter.io/developer/6780130813) |

## What reviewers say

### つみ筋

[App page](https://appshunter.io/ios/app/rpg/id6757642776)

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

**In-app purchases:** none


### Muscle Stamp

[App page](https://appshunter.io/ios/app/muscle-stamp/id6780130811)

Effortlessly log your workouts with a single tap for each muscle group trained. Set personalized weekly goals, track your training streaks, and visualize your progress over time. Focus on your fitness without the hassle of complex tracking.

**Highlights:** One-tap muscle group logging, Personalized weekly training goals, Workout streak tracking, Progress visualization, Built-in session timer

**In-app purchases:** none


## Frequently asked questions

### Is つみ筋 free?

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

### Is Muscle Stamp free?

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

### Do つみ筋 or Muscle Stamp have ads?

つみ筋 shows ads; Muscle Stamp does not.

### Which is updated more often, つみ筋 or Muscle Stamp?

つみ筋 ships an update every 4 days, and Muscle Stamp every 4 days. Most recently, つみ筋 was updated on October 6, 2026 and Muscle Stamp on October 14, 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.*