# Lean · 薄肌 vs REBL

The clearest difference is review sentiment: REBL at 100% against Lean · 薄肌's 0%. REBL also leads on update cadence (every 5 days vs every 3 weeks). Lean · 薄肌's advantage is iOS requirement (18.0 vs 26.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Lean · 薄肌 sells 2 in-app purchases, starting at $8.99 per month and REBL sells 2 in-app purchases, starting at $7.99 per month. Whichever you choose, the download price is not the number that matters.

Lean · 薄肌 ships an update every 3 weeks, REBL every 5 days. The most recent releases landed on October 31, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Lean · 薄肌 | REBL |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (9 ratings)](https://appshunter.io/ios/app/rebl-ai-strength-coach/id6768460405/reviews)** |
| Number of ratings | — | **9** |
| Positive reviews | 0.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 5 days** |
| Monetization | Freemium | Freemium |
| Size | 37 MB | 12 MB |
| Requires iOS | **18.0** | 26.0 |
| Devices | iPhone, Apple Watch | iPhone, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [海圆 马](https://appshunter.io/developer/1896405198) | [Galeworks, LLC](https://appshunter.io/developer/6784815812) |

## What reviewers say

### Lean · 薄肌

[App page](https://appshunter.io/ios/app/lean/id6767283263)

This app is an AI-powered strength training journal that tracks your workouts, provides post-session coaching, and visualizes your progress. It offers built-in programs, custom plan creation, and AI-assisted planning based on your goals and equipment.

**Highlights:** AI-assisted workout planning, Voice and text workout logging, Post-workout AI debriefs, Set-by-set logging with PR detection, Apple Watch standalone app, HealthKit integration, 3D muscle heatmap visualization

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| LumaFit Pro Monthly | $8.99 | per month |
| LumaFit Pro Yearly | $59.99 | per year |


### REBL

[App page](https://appshunter.io/ios/app/rebl-ai-strength-coach/id6768460405)

This app acts as an AI-powered strength coach, providing personalized workout guidance and readiness scores. It offers offline suggestions for weight and reps, tracks workout intensity, and helps users understand their training progress without requiring an internet connection or account.

**Highlights:** Offline AI workout suggestions, Readiness score and widget, Workout intensity tracking, Apple Watch app integration, Apple Health integration, Exercise library, AI-driven adaptive programs

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| trAIner Pro (Monthly) | $7.99 | per month |
| trAIner Pro (Annual) | $39.99 | per year |


## Frequently asked questions

### Is Lean · 薄肌 free?

Lean · 薄肌 is free to download, with in-app purchases available.

### Is REBL free?

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

### Do Lean · 薄肌 or REBL have ads?

Neither Lean · 薄肌 nor REBL shows ads.

### Which is updated more often, Lean · 薄肌 or REBL?

Lean · 薄肌 ships an update every 3 weeks, and REBL every 5 days. Most recently, Lean · 薄肌 was updated on October 31, 2026 and REBL on October 24, 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.*