MAHJ: Learn American Mahjong

Welcome2Mahj

In-app purchases

About this app

MAHJ is a complete, beginner-friendly course for the American (NMJL-style) game. No experience needed: you'll go from "which tile is that?" to sitting down at a real table with confidence.

WHAT YOU'LL LEARN
• All 152 tiles by sight — craks, bams, dots, winds, dragons, flowers, and jokers
• How to read the card and match your tiles to winning hands
• Setup, building the wall, and dealing — with hands-on, interactive tables
• The Charleston: what to pass, what to keep, and why
• Jokers, calling, the courtesy pass, scoring, etiquette, and common mistakes
• 18 bite-size lessons, each taught one piece at a time

PRACTICE UNTIL IT CLICKS
• Tile drills, hand-building games, and a daily puzzle
• Play a full hand against friendly AI bots — start to finish
• A Hand Analyzer that suggests the best hands for your tiles
• Ask the Coach anything about the rules — answers grounded in the lessons

LEARN WITH YOUR TABLE
• Start a crew — invite friends with a share link and track everyone's progress together, so your whole group is ready for game night. Mahjong takes four; bring yours.

START FREE
The first lessons, tile drills, and daily puzzle are free. One simple, one-time purchase unlocks all 18 lessons, play vs bots, the Coach, and the Hand Analyzer — no subscription, nothing that auto-renews.

MAHJ is an independent educational tool and is not affiliated with, endorsed by, or sponsored by the National Mah Jongg League (NMJL). To play with the official card, buy the current year's card at nationalmahjonggleague.org.

Happy learning — see you at the table!

Ratings and reviews

Fantastic app! My mom has been encouraging me to learn so I can play with her and her friends. This app is very thoughtfully designed with great attention to detail and a surprising number of features to really help you absorb all the rules and learn basic strategies. The free preview was great so I paid for the full app. I appreciate that it's a one time purchase instead of a subscription and that there aren't distracting ads in the free version. This is what all apps should be like.

This is a great educational app! Different people learn in different ways, so it's nice that you can read AND listen to the lesson. Sometimes the voice doesn't match the written words, and that confuses me. A,side from that, this app is helping me a lot.

5-stars for the first three lessons. Laid out really well for someone starting out with no knowledge of the game. Then I hit the paywall to access lesson four.

What’s new

What's new:
• New "Your First Full Game" walkthrough — play a full hand from start to finish with step-by-step guidance.
• Clearer lessons — friendlier explanations of the Charleston, calling, scoring, and those first real-table moments, with more practical tips.
• Bigger, higher-contrast text throughout for easier reading on any device.
• Smarter in-game coaching that won't steer you away from a hand you're about to win.
• Smoother purchases and an easier "Restore" across devices.