Riichi Calc - Japanese Mahjong

Contains ads
363 reviews
Content rating
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About this app

Riichi Calc is an easy to use app that takes any valid Japanese mahjong hand and calculates all possible winning combinations. A great companion for any Japanese mahjong player! Feel free to e-mail me about any calculation errors.

 • Used for the Japanese variant of Mahjong
 • Order is irrelevant. The app will rearrange the tiles for you
 • Determine waits of a tenpai hand
 • Provides warnings against illegal combinations (e.g. riichi with an open hand)
 • Calculate points using han and fu as the input
 • Display terminology in English or romanized Japanese
Updated on
Jul 13, 2024

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
App activity, App info and performance, and Device or other IDs
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

333 reviews
Alex Molina
September 20, 2022
It a great app and functions well. There's definitely some quality of life things that could be adjusted such as being able to more conveniently mark the winning tile or at least i don't know how to do it other than inputting it last. Also it would be nice to be able to remove ads.
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Michael Lonergan
May 26, 2024
Simple and effective. Wish there was a way to remove ads (currently option says not available). Otherwise does what it says on the tin. Cheers!
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Franciscus Snel
February 9, 2021
Works like a charm. Only 1 tiny comment: it appears you'll have to set the settings to Japanese Romaji, NOT to English..for otherwise it will not let you enter pairs and cannot do the calculation for you.
3 people found this review helpful