# The Mahj Index: Mahjong Coach — Built for American Mahjong.

> American Mahjong practice and game tracking tool with performance rating. (iPhone/iPad app by The Mahj Index.)

- Source: https://appshunter.io/ios/app/the-mahj-index-mahjong-coach/id6762097265 (this page in markdown: same URL + `.md`)
- Developer: [The Mahj Index](https://appshunter.io/developer/1892888912)
- Category: Utilities, Lifestyle
- Price: Free with in-app purchases
- Rating: 4.80/5 from 5 App Store ratings · 2 written reviews indexed
- Age rating: 17+
- Requires: iOS 15.1 · 39 MB
- Languages: American English
- Released: 2026-08-05
- Data updated: 2026-09-04
- Monetization: freemium
- User reviews in markdown: https://appshunter.io/ios/app/the-mahj-index-mahjong-coach/id6762097265/reviews.md

## What is The Mahj Index?

The Mahj Index is built for American Mahjong players who want to practice smarter, track their play, and improve between every game night.

Drills take minutes. Logging a game takes seconds. And every result feeds a player rating that shows how you actually play (not how you think you play).
Unlike traditional Mahjong apps, The Mahj Index doesn't replace your table. It helps you get more from every game you play.

DAILY PRACTICE THAT FITS YOUR SCHEDULE
Train one skill at a time with quick interactive drills designed for American Mahjong.
• Form a Winning Line: Build valid hands using the current National Mah Jongg League card.
• Mahjle: Solve the daily pattern recognition challenge.
• Charleston: Practice stronger passing decisions.
• Reading Exposures: Learn to recognize what the table is telling you.
• Scrimmages: Practice real game scenarios against our bots.
Receive instant feedback after every drill. Pivot Practice is coming soon.

TRACK EVERY GAME
Log hands in seconds.
TMI automatically calculates scores, payouts, standings, and statistics for both Friendly Stakes and Tournament scoring.
No spreadsheets.
No calculators.
No keeping score by hand.

MEASURE REAL PROGRESS
Your TMI Rating measures your performance using Glicko-2, the same rating system family trusted across competitive games.
Every game is verified by the other players at your table, helping keep ratings accurate and meaningful.
Your MHIN is your permanent player profile, making it easy to track your progress wherever you play.

KNOW YOUR GAME
Understand how you actually play.
Track your:
• Win rate over time
• Favorite lines
• Wall games
• Playing style
• Mahj Persona
See your strengths, spot your patterns, and always know what to practice next.

PLAY WITH YOUR PEOPLE
Host games, invite friends with a code or QR, and build a shared history together.
See who you play with most, compare results over time, and settle the rematch.

FREE TO JOIN
Create your MHIN, host games, log scores, and start building your TMI Rating for free.
TMI Premium unlocks the complete practice library, advanced analytics, and your full game history.
Players who join with a friend's referral code receive 30 days of Premium at no cost.

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Built for American Mahjong using the current National Mah Jongg League card, updated annually. The Mahj Index is an independent app and is not affiliated with or endorsed by the National Mah Jongg League (NMJL).

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Questions? support@themahjindex.com
Privacy Policy: https://themahjindex.com/privacy
Terms of Use: https://themahjindex.com/terms

## Key features

- Interactive Mahjong drills
- Game logging and scoring
- AI-powered player rating (Glicko-2)
- Performance analytics
- Friend invitations and game hosting
- National Mah Jongg League card support

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| TMI Premium Monthly | $4.99 | per month |
| TMI Premium Annual | $49.99 | per year |


## Recent user reviews (2 of 2)

All indexed reviews: https://appshunter.io/ios/app/the-mahj-index-mahjong-coach/id6762097265/reviews.md

### 5/5 — Easy and fun!

*2026-08-16*

Thorough with lots of helpful information, easy to use and understand. So much fun!

### 5/5 — Modern, intuitive, beautiful - just like the game

*2026-08-06*

Such an easy and intuitive app to practice and learn mahjong. Have been looking for an app like this for soooo long. Finally something that feels modern and useful!

## Frequently asked questions about The Mahj Index

### What is The Mahj Index?

The Mahj Index is a mobile application designed to help American Mahjong players practice, track their games, and improve their skills. It offers interactive drills and a performance rating system to analyze gameplay.

### Does The Mahj Index have ads?

No, The Mahj Index does not contain advertisements. The app is free to join with optional premium features available through subscription.

### How does The Mahj Index calculate player ratings?

The Mahj Index uses the Glicko-2 rating system, a method trusted in competitive gaming, to calculate a player's TMI Rating. This rating is based on game performance and is verified by other players at the table for accuracy.

### What are the subscription options for The Mahj Index?

TMI Premium offers two subscription plans: a monthly plan for $4.99 and an annual plan for $49.99. Both plans include a 7-day free trial. Premium unlocks the full practice library, advanced analytics, and complete game history.

### What devices does The Mahj Index support?

The Mahj Index is currently supported on iPhone and iPod devices. It is designed for users who want to practice and track their Mahjong games on the go.

### How often is The Mahj Index updated?

The Mahj Index was last updated on August 12, 2026, with version 1.1. The app is built for American Mahjong using the current National Mah Jongg League card, which is updated annually.

### What is the age rating for The Mahj Index?

The Mahj Index has an age rating of 17+. This rating is typically assigned to apps that may contain content not suitable for younger users, though specific reasons are not detailed in the provided data.

### Can I play The Mahj Index offline?

The provided description focuses on practice drills and game logging, which may require an internet connection for certain features like hosting games or syncing ratings. Specific offline capabilities are not detailed.

## Version history (last 3 releases)

### 1.1.1 — 2026-08-22

Small release, sharper edges:
- Your free week now unlocks everything the moment you sign up.
- Have a friend's MHIN? You can enter it any time from Settings.
- Steadier streaks and a faster friends list.
- Fixed a Scrimmage bug that could end your hand early.

### 1.1 — 2026-08-12

Play at a higher level with 1.1.0:
- Scrimmage: play a full game against three bots, from the first Charleston to the final discard.
- New members: everything is unlocked free for your first 7 days. No credit card, no strings.
- The Learn module now links straight into practice: drill what you just learned.
- Sharper stats, smoother streaks, and fixes throughout.

### 1.0 — 2026-08-05

No release notes.

## Related topics

[mahjong tracker](https://appshunter.io/ios/topics/mahjong-tracker) · [sichuan mahjong trainer](https://appshunter.io/ios/topics/sichuan-mahjong-trainer) · [free mahjong practice](https://appshunter.io/ios/topics/free-mahjong-practice)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-04.*