Riichi Calc - Japanese Mahjong

Takes any valid Japanese mahjong hand and calculates all winning combinations.

Richard L · ric.ov.RiichiCalc

Not rated yet 100K+ downloads v2.3.9 3.5 MB Android 6.0+ PEGI 3 · Everyone

Download APK 3.5 MB All versions

Signature matches the Google Play version Details

Riichi Calc - Japanese Mahjong screenshot 1

Riichi Calc - Japanese Mahjong screenshot 2

Riichi Calc - Japanese Mahjong screenshot 3

Riichi Calc - Japanese Mahjong screenshot 4

Riichi Calc - Japanese Mahjong screenshot 5

At a glance

Latest version: v2.3.9 (48)
Updated: Mar 27, 2026 (6 months ago)
APK size: 3.5 MB
Requires: Android 6.0+ (API 23)
CPU support: Any (no native code)
Category: Tools (app)
Permissions: 9
Website: mahjong.onevis.net
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Riichi Calc - Japanese Mahjong is an app by Richard L in the Tools category. It has no native code, so it runs on any Android processor.

Since version 2.3.5, the minimum Android version rose from 4.4 to 6.0. It asks for 9 permissions, none of them sensitive. Compared with version 2.3.8, it adds 3 new permissions (“Access adservices ad id”, “Access adservices attribution” and “Access adservices topics”) and drops 1 (“Run at startup”). The app can read the advertising ID that ad and analytics services use.

What's new in v2.3.9

Stability updates

Description

From the listing uploaded by “appupdater”.

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. Features: 　• 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

Version history

3 versions are listed, going back to v2.3.5. Since v2.3.9 it requires Android 6.0+.

v2.3.9 LATEST Mar 27, 2026 3.5 MB TRUSTED v2.3.8 Jul 8, 2025 3.3 MB TRUSTED v2.3.5 Dec 3, 2024 3.3 MB TRUSTED

All 3 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Mar 27, 2026.
Certificate issued to “Richard Liu” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Mar 27, 2026
Validated against Google Play Mar 27, 2026
Signed byCN=Richard Liu
Signing certificate (SHA-1)20:7F:57:2A:EF:BC:20:26:42:87:D9:7D:79:8E:41:12:85:10:19:0A
File MD565ce3cc35a4d295d1041d0bebc4f7b79
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (9)

Riichi Calc - Japanese Mahjong requests 9 permissions, none of them sensitive.

Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
Access adservices topics android.permission.ACCESS_ADSERVICES_TOPICS
Advertising ID com.google.android.gms.permission.AD_ID
Full network access android.permission.INTERNET
Internal broadcast protection (app-defined) ric.ov.RiichiCalc.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Run foreground services android.permission.FOREGROUND_SERVICE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Basic touch input android.hardware.faketouch
Portrait screen android.hardware.screen.portrait

Riichi Calc - Japanese Mahjong APK: questions and answers

Is there a version of Riichi Calc - Japanese Mahjong for older Android phones?

The current version needs Android 6.0 or later. Version 2.3.8 is the newest listed build that installs on Android 4.4 and later. Get version 2.3.8 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is the Riichi Calc - Japanese Mahjong APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 65ce3cc35a4d295d1041d0bebc4f7b79.