# 人間バッテリー vs Muscle Memory

The clearest difference is ads: 人間バッテリー at none against Muscle Memory's shown. Muscle Memory's advantage is update cadence (every 4 days vs every 4 weeks) and iOS requirement (15.5 vs 26.0). On price, in-app purchases and device support there is nothing between them.

Both are free to download. 人間バッテリー sells 4 one-off in-app purchases and Muscle Memory sells 1 in-app purchase, starting at $2.99 per month. Whichever you choose, the download price is not the number that matters.

人間バッテリー ships an update every 4 weeks, Muscle Memory every 4 days. The most recent releases landed on October 30, 2026 and October 25, 2026 respectively.

## The numbers

| Metric | 人間バッテリー | Muscle Memory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 weeks | **Every 4 days** |
| Size | 15 MB | 123 MB |
| Requires iOS | 26.0 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [kakeru takeda](https://appshunter.io/developer/1814024829) | [hiroto hashimoto](https://appshunter.io/developer/1884572209) |

## What reviewers say

### 人間バッテリー

[App page](https://appshunter.io/ios/app/id6745805102)

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

**In-app purchases (4)**

| Purchase | Price | Billing |
| --- | --- | --- |
| ちいさなカンパ | $0.99 | one-time |
| うれしいカンパ | $1.99 | one-time |
| しっかりカンパ | $3.99 | one-time |
| 全力カンパ | $6.99 | one-time |


### Muscle Memory

[App page](https://appshunter.io/ios/app/muscle-memory-workout-log/id6760459152)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| プレミアムプラン | $2.99 | per month |


## Frequently asked questions

### Is 人間バッテリー free?

人間バッテリー is free to download, with in-app purchases available.

### Is Muscle Memory free?

Muscle Memory is free to download, with in-app purchases available.

### Do 人間バッテリー or Muscle Memory have ads?

Muscle Memory shows ads; 人間バッテリー does not.

### Which is updated more often, 人間バッテリー or Muscle Memory?

人間バッテリー ships an update every 4 weeks, and Muscle Memory every 4 days. Most recently, 人間バッテリー was updated on October 30, 2026 and Muscle Memory on October 25, 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.*