# Lean · 薄肌 vs HahaFit

The clearest difference is in-app purchases: HahaFit at none against Lean · 薄肌's 2. HahaFit also leads on update cadence (every 3 days vs every 3 weeks) and iOS requirement (15.0 vs 18.0). On price, ads and device support there is nothing between them.

Both are free to download. Lean · 薄肌 sells 2 in-app purchases, starting at $8.99 per month. HahaFit asks for nothing beyond the download.

Lean · 薄肌 ships an update every 3 weeks, HahaFit every 3 days. Both last shipped on October 31, 2026.

## The numbers

| Metric | Lean · 薄肌 | HahaFit |
| --- | --- | --- |
| Price | Free | Free |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 3 days** |
| Monetization | Freemium | — |
| Size | 37 MB | 49 MB |
| Requires iOS | 18.0 | **15.0** |
| Devices | iPhone, Apple Watch | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [海圆 马](https://appshunter.io/developer/1896405198) | [Lin Chen](https://appshunter.io/developer/1205833402) |

## 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 |


### HahaFit

[App page](https://appshunter.io/ios/app/hahafit-ai-rep-counter/id6814697765)

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

**In-app purchases:** none


## Frequently asked questions

### Is Lean · 薄肌 free?

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

### Is HahaFit free?

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

### Do Lean · 薄肌 or HahaFit have ads?

Neither Lean · 薄肌 nor HahaFit shows ads.

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

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