# Lean vs 快数

The clearest difference is review sentiment: Lean at 89% against 快数's 0%. Lean also leads on rating (4.3 vs 3.0) and ratings volume (65 vs 1). 快数's advantage is in-app purchases (none vs 1) and iOS requirement (12.0 vs 14.0). On price, update cadence and ads there is nothing between them.

Both are free to download. Lean sells 1 one-off in-app purchase. 快数 asks for nothing beyond the download.

Lean holds the better App Store score, 4.3 against 3.0. That said, the two scores are not equally well evidenced: Lean has 65 ratings behind it against 1, so its average is the more settled of the two. Written reviews point the same way: 89% of Lean's written reviews are positive against 0% of 快数's.

Lean ships an update monthly, 快数 every 3 weeks. The most recent releases landed on September 21, 2026 and June 1, 2026 respectively.

## The numbers

| Metric | Lean | 快数 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (65 ratings)](https://appshunter.io/ios/app/lean/id1435069659/reviews)** | [3.0 (1 ratings)](https://appshunter.io/ios/app/id1526237746/reviews) |
| Number of ratings | **65** | 1 |
| Positive reviews | **89.3% of reviews** | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Monthly | **Every 3 weeks** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 42 MB | 584 MB |
| Requires iOS | 14.0 | **12.0** |
| Devices | **iPhone, iPad, iPod, Apple Watch** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [家浩 汪](https://appshunter.io/developer/1071202242) | [Hangzhou Dynamic Technology Co.,Ltd](https://appshunter.io/developer/1526237748) |

## What reviewers say

### Lean

[App page](https://appshunter.io/ios/app/lean/id1435069659)

This app uses motion sensors to count repetitions and track time for bodyweight exercises. Create custom workout plans and sync data with Apple Health.

**Highlights:** Repetition counter, Bodyweight exercise library, Custom workout plans, Voice tips, Workout and calorie tracking, Apple HealthKit integration

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Version | $5.99 | one-time |


### 快数

[App page](https://appshunter.io/ios/app/id1526237746)

This app uses AI to count repetitions for various exercises like jump rope, sit-ups, and squats. It offers a teaching management system for educators to track student progress and provides detailed workout reports.

**Highlights:** AI exercise counting, Teaching management system, Student progress tracking, Automated workout reports, Multiple training exercises, Fun and engaging workouts

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Lean free?

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

### Is 快数 free?

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

### Which has better reviews, Lean or 快数?

Lean is rated higher. Lean averages 4.3 out of 5 from 65 ratings, while 快数 averages 3.0 from 1 ratings.

### Do Lean or 快数 have ads?

Neither Lean nor 快数 shows ads.

### Which is updated more often, Lean or 快数?

Lean ships an update monthly, and 快数 every 3 weeks. Most recently, Lean was updated on September 21, 2026 and 快数 on June 1, 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.*