# Riichi Calc - Japanese Mahjong

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

Canonical page: [https://chrome-stats.com/d/ric.ov.RiichiCalc](https://chrome-stats.com/d/ric.ov.RiichiCalc)

## Overview

- **ID:** `ric.ov.RiichiCalc`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** Richard L
- **Category:** TOOLS
- **Downloads:** 122,475
- **Rating:** 4.13 / 5 (405 ratings)
- **Version:** 2.3.9
- **Last updated:** 2025-10-20
- **First published:** 2013-09-06
- **Publisher country:** AU
- **Size:** 3.47 MB
- **Data as of:** 2026-09-15
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=ric.ov.RiichiCalc)
- **Website:** [https://lrih.github.io/](https://lrih.github.io/)
- **Privacy policy:** [https://lrih.github.io/riichi/](https://lrih.github.io/riichi/)

## Description

Riichi Calc is a user-friendly Chrome extension designed specifically for players of Japanese Mahjong. It simplifies the game by taking any valid hand and computing all possible winning combinations, helping players to strategize effectively. The app automatically rearranges tiles, determines waits for tenpai hands, and provides warnings for illegal plays such as riichi with an open hand. Users can input han and fu values to accurately calculate points and can toggle terminology between English and romanized Japanese. This tool is an indispensable aid for both beginners and seasoned mahjong enthusiasts seeking to enhance gameplay analysis and accuracy.

## Rankings

- #201,644 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.WAKE_LOCK`
- `com.google.android.gms.permission.AD_ID`
- `ric.ov.RiichiCalc.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

Riichi Calc is praised for easy, beginner-friendly scoring and reliable calculations, with responsive support. However, ads, a confusing swipe-based UI, and missing features (ron/tsumo, pinfu, rinshan, local rules) are common complaints. Occasional errors like 'invalid hand' also occur. Overall, it's a strong learning and scoring tool, but UX, ad experience, and feature gaps are the main recurring issues.

### Pros

- Easy to use and straightforward for calculating Riichi scores.
- Beginner-friendly, helping players learn scoring quickly.
- Provides reliable score calculations when you enter hand and conditions.
- Useful for identifying Yaku and understanding scoring in Japanese Mahjong.
- Responsive developer with quick bug fixes and good support.

### Cons

- Ads are intrusive and there is no easy way to remove them.
- UI/UX is confusing, with important options moved behind swipes and lacking visual cues.
- Missing essential features like specifying ron vs tsumo, pinfu yaku, rinshan after kita, and support for local variants.
- Occasional reliability issues like 'invalid hand' errors and other bugs.
- Some users report a previously available tab or access path to settings being hidden or removed.

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Source: [Chrome-Stats](https://chrome-stats.com/d/ric.ov.RiichiCalc)