# Mu. vs RIRLift

The clearest difference is in-app purchases: Mu. at none against RIRLift's 6. On price, update cadence, ads and device support there is nothing between them.

Both are free to download. RIRLift sells 6 in-app purchases, starting at $9.99 per month. Mu. asks for nothing beyond the download.

Mu. ships an update every 10 days, RIRLift every 6 days. The most recent releases landed on October 28, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Mu. | RIRLift |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[4.9 (18 ratings)](https://appshunter.io/ios/app/rirlift-hypertrophy-log/id6768680416/reviews)** |
| Number of ratings | — | **18** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 10 days | **Every 6 days** |
| Monetization | — | Freemium |
| Size | 34 MB | 240 MB |
| Requires iOS | 18.6 | **17.0** |
| Devices | **iPhone, iPad, Apple Watch** | iPhone, Apple Watch |
| Age rating | 12+ | 4+ |
| Developer | [Liminal Pictures](https://appshunter.io/developer/1895974335) | [Scribelet](https://appshunter.io/developer/1894614631) |

## What reviewers say

### Mu.

[App page](https://appshunter.io/ios/app/mu/id6766069551)

**Features:** macOS Compatibility, Apple Watch app, Vision Pro support

**In-app purchases:** none


### RIRLift

[App page](https://appshunter.io/ios/app/rirlift-hypertrophy-log/id6768680416)

This app helps you get stronger with an AI coach and a workout log. It guides your next lift based on your performance and effort, and allows you to build personalized training plans. Track progress, view muscle maps, and even import history from other apps.

**Highlights:** AI lifting coach for guidance and planning, Log sets with weight, reps, and RIR, Build personalized workout programs, Train on iPhone and Apple Watch, Track personal records and strength trends, Import workout history from other apps

**Features:** Apple Watch app, Vision Pro support

**In-app purchases (6)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RIRLift Pro Monthly | $9.99 | per month |
| RIRLift Pro Monthly | $9.99 | per month |
| RIRLift Pro Yearly | $79.99 | per year |
| RIRLift Pro Yearly | $79.99 | per year |
| RIRLift Pro Yearly | $79.99 | per year |
| RIRLift Lifetime | $199.99 | one-time |


## Frequently asked questions

### Is Mu. free?

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

### Is RIRLift free?

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

### Do Mu. or RIRLift have ads?

Neither Mu. nor RIRLift shows ads.

### Which is updated more often, Mu. or RIRLift?

Mu. ships an update every 10 days, and RIRLift every 6 days. Most recently, Mu. was updated on October 28, 2026 and RIRLift on October 31, 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.*