Mahjong Skill Builder
Learn Yaku, Rules & Scoring
Free · In‑App Purchases · Designed for iPad. Not verified for macOS.
Mahjong Quiz
A serious training app for mastering Japanese (Riichi) Mahjong yaku, scoring, and reading waits.
Struggling with scoring? Can't spot your waits at a glance? You're not alone. This app breaks yaku, han counting, han & fu reading, scoring, and wait recognition into 6 levels you can practice again and again with fun quizzes. It also includes a Hand Scanner: just take a photo of your hand to get its yaku, han, fu, and points.
■ Level up step by step with 6 quiz modes
[Lv.0 How many han?]
See a yaku name and answer how many han it is worth. An introductory mode for memorizing yaku values.
[Lv.1 Which yaku?]
Look at a winning hand and identify its yaku. Covers basic and combined yaku, including hands with calls (chi, pon). Switch between "Combined" (select all yaku at once) and "Individual" (select one at a time) answer styles.
[Lv.2 Han & Fu?]
Read the han and fu of a winning hand. You'll naturally learn how han add up and how fu are counted (melds, wait shapes, and how the hand was won). Hands of mangan or higher can be set to "Han only".
[Lv.3 Points? - Score Table]
Given han and fu, answer the payment for dealer/non-dealer and ron/tsumo. Train your score table memory, including rounding up to the nearest 100 and mangan through yakuman.
[Lv.4 Points? - Winning Hand]
An all-round mode: look at a winning hand, judge its yaku, han & fu, and answer the final points. A "Show yaku" hint is available.
[Lv.5 What's the wait?]
Look at a tenpai hand and find its winning tiles. From basic ryanmen, kanchan, and shanpon waits to irregular three-sided waits and the nine-sided Chuuren Poutou wait. All winning tiles are shown after you answer.
■ Realistic, game-like questions
Includes 100 winning hands and 100 tenpai hands. Conditions such as dealer/non-dealer, ron/tsumo, seat and round wind, dora, ura-dora, red fives, riichi, ippatsu, and calls (chi, pon, kan) are shown at a glance. Covers everything from tanyao, pinfu, and yakuhai to sanshoku, ittsu, chanta, and yakuman such as kokushi musou and daisangen.
■ Hand Scanner
Take a photo of your hand or pick one from your library, and AI recognizes the tiles and calculates yaku, han, fu, and points automatically.
- Choose between high-accuracy "Cloud AI" and fast, offline-capable "Our AI"
- Tap any tile to correct it; the result recalculates automatically
- Set dealer/non-dealer, ron/tsumo, round and seat wind, riichi, ippatsu, dora count, and calls
Perfect for checking scores after a real game.
■ Customize how you learn
- Number of choices (4, 6, 8, or 10)
- Auto-advance after a correct answer (manual or 1-3 seconds)
- Question order (random, ascending, descending)
- Daily practice reminder at a time you choose
- Languages: Japanese, English, Chinese, Korean, Vietnamese
■ Track your progress
The activity calendar shows the days you practiced, and per-mode accuracy shows your strengths and weaknesses. The result screen gives feedback based on your score, and you can share your results on social media.
■ Premium
- Remove all ads
- Choose the number of questions (10, 50, 100, or endless)
- "Weak first" mode that prioritizes questions you got wrong
- Unlimited Hand Scanner (free version: up to 10 scans per day)
Premium is offered as monthly and annual auto-renewing subscriptions.
- Payment will be charged to your Apple ID account at confirmation of purchase.
- The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period.
- You can manage or turn off auto-renewal in your App Store account settings after purchase.
■ Download now and become a scoring master
With repeated practice, you'll be able to calculate scores quickly in your head at the table. Make the most of your spare moments to improve your Mahjong.
Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://aquapeakstudio.com/privacy-policy
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Mahjong Quiz
A serious training app for mastering Japanese (Riichi) Mahjong yaku, scoring, and reading waits.
Struggling with scoring? Can't spot your waits at a glance? You're not alone. This app breaks yaku, han counting, han & fu reading, scoring, and wait recognition into 6 levels you can practice again and again with fun quizzes. It also includes a Hand Scanner: just take a photo of your hand to get its yaku, han, fu, and points.
The developer, Keita Ide, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Usage Data
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Usage Data
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Keita Ide
- Size
- 46.5 MB
- Category
- Board
- Compatibility
Requires iOS 15.1 or later.
- iPhone
Requires iOS 15.1 or later. - iPad
Requires iPadOS 15.1 or later. - iPod touch
Requires iOS 15.1 or later. - Mac
Requires macOS 12.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
English and 5 more
- English, Japanese, Korean, Simplified Chinese, Traditional Chinese, Vietnamese
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Skill Builder Premium Yearly $9.99
- Skill Builder Premium Monthly $0.99
- Copyright
- © 2025 AquaPeak