# Learn to recognize the clock vs Mahj School

The clearest difference is price: Mahj School at Free against Learn to recognize the clock's $0.99. Mahj School also leads on update cadence (every 5 weeks vs every 28 months). Learn to recognize the clock's advantage is in-app purchases (none vs 1) and device support (4 vs 1). On ads there is nothing between them.

Mahj School is free to download; Learn to recognize the clock costs $0.99 up front. Mahj School sells 1 one-off in-app purchase. Learn to recognize the clock asks for nothing beyond the download.

Learn to recognize the clock ships an update every 28 months, Mahj School every 5 weeks. The most recent releases landed on November 6, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Learn to recognize the clock | Mahj School |
| --- | --- | --- |
| Price | $0.99 | **Free** |
| Rating | — | **[3.7 (3 ratings)](https://appshunter.io/ios/app/mahj-school/id6760208163/reviews)** |
| Number of ratings | — | **3** |
| Positive reviews | — | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 28 months | **Every 5 weeks** |
| Monetization | — | Free with in-app purchases |
| Size | 29 MB | 7 MB |
| Requires iOS | **11.0** | 17.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [景琦 孙](https://appshunter.io/developer/1030985695) | [CloudApp IT, LLC](https://appshunter.io/developer/467540000) |

## What reviewers say

### Learn to recognize the clock

[App page](https://appshunter.io/ios/app/learn-to-recognize-the-clock/id1109949616)

**Features:** Vision Pro support

**In-app purchases:** none


### Mahj School

[App page](https://appshunter.io/ios/app/mahj-school/id6760208163)

Master American Mahjong with interactive lessons and guided practice. Learn tiles, rules, and strategy from beginner to confident play. Designed for new players with a beautiful interface and no ads.

**Highlights:** Interactive lessons for beginners, Guided practice scenarios, Learn tile suits, honors, and jokers, Understand NMJL card and Charleston, Build and declare exposures, Complete game flow instruction

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock All Lessons | $9.99 | one-time |


## Frequently asked questions

### Is Learn to recognize the clock free?

Learn to recognize the clock costs $0.99, with no in-app purchases.

### Is Mahj School free?

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

### Do Learn to recognize the clock or Mahj School have ads?

Neither Learn to recognize the clock nor Mahj School shows ads.

### Which is updated more often, Learn to recognize the clock or Mahj School?

Learn to recognize the clock ships an update every 28 months, and Mahj School every 5 weeks. Most recently, Learn to recognize the clock was updated on November 6, 2026 and Mahj School 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.*