# RPE Lab vs Muscle Memory

The clearest difference is in-app purchases: RPE Lab at none against Muscle Memory's 1. RPE Lab also leads on ads (none vs shown). Muscle Memory's advantage is iOS requirement (15.5 vs 18.6). On price, update cadence and device support there is nothing between them.

Both are free to download. Muscle Memory sells 1 in-app purchase, starting at $2.99 per month. RPE Lab asks for nothing beyond the download.

RPE Lab ships an update every 8 days, Muscle Memory every 4 days. The most recent releases landed on October 10, 2026 and October 17, 2026 respectively.

## The numbers

| Metric | RPE Lab | Muscle Memory |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 8 days | **Every 4 days** |
| Size | 9 MB | 123 MB |
| Requires iOS | 18.6 | **15.5** |
| Devices | iPhone, iPad | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Carlo Feletti](https://appshunter.io/developer/1653237990) | [hiroto hashimoto](https://appshunter.io/developer/1884572209) |

## What reviewers say

### RPE Lab

[App page](https://appshunter.io/ios/app/rpe-lab/id6757129710)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 RPE Lab free?

RPE Lab is free to download, with no in-app purchases.

### Is Muscle Memory free?

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

### Do RPE Lab or Muscle Memory have ads?

Muscle Memory shows ads; RPE Lab does not.

### Which is updated more often, RPE Lab or Muscle Memory?

RPE Lab ships an update every 8 days, and Muscle Memory every 4 days. Most recently, RPE Lab was updated on October 10, 2026 and Muscle Memory on October 17, 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.*