雀ラボ - 麻雀点数計算・対局管理・オンライン対応

JanLab is a full-fledged mahjong game management app that lets you play mahjong games on your smartphone.

It allows you to manage every aspect of a game in real time, from the progress of each hand, the movement of points, declarations of "reach," to the status of bonus rounds and deposits.

It offers both an offline mode where you manage the entire game from a single smartphone, and an online mode where all participants share the same game on their smartphones.

Score calculation is fully automatic, and it fully supports 3-player mahjong.

■ Main Features

▼ Score Calculation (Fully Automatic / Manual Support)
- Automatic calculation via tile tap input or camera capture
- Supports manual input by directly specifying han points and yaku (scoring hands)
- Supports rare cases such as multiple ron, nagashi mangan, and chombo (penalty)

▼ Game Progress Management
- Real-time management of prevailing wind, player's wind, rounds, deposit sticks, and point stick movements
- Automatic processing of dealer change, consecutive wins, and no-ten penalties

▼ Online Mode
- Real-time sharing of the game on the smartphones of all participants around the table
- Easy participation via QR code or room ID; no registration required, nickname only is sufficient
- Tile efficiency function (confirmation of efficient discard candidates, number of shanten, and effective tiles)

▼ Group Management
- Create and manage multiple groups (tables) independently
- Register members for each group, and separately compile game records and cumulative results
- Manage tables separately for different purposes, such as company tables or friends' tables

▼ Match Performance Analysis Function
- Automatically creates profit/loss graphs for each match, analyzing by period, group, and member
- Visualize your tendencies and win rate

▼ Supported Rules / Detailed Rule Settings
- Supports both 4-player and 3-player mahjong, including half-game and East-wind matches
- Numerous rule items can be customized in detail, including Uma/Oka, Atama-hane, Nagashi Mangan, Kazoe Yakuman, Yakitori, Tobi, and local yaku
- Different rules can be applied to each group in both 4-player and 3-player mahjong

■ Recommended for:

- Those who want to reduce the hassle of calculating scores and managing point sticks at a manual mahjong table
- Those who want to share matches and point sticks in real time on the smartphones of all players at the table
- Those who want to continuously manage and analyze their own and their teammates' match performance
- Those who want to adapt the app to their table's unique rules
- Those who want serious match performance management even in 3-player mahjong

■ Data Management & Privacy

* Data is primarily stored on your device (local-first design)
* Communication with the server only during online matches
* No personal information registration required (nickname only)
* Data export/import function allows for smooth transitions when changing devices

■ About Usage

* This app is free to use (with ads)
* A "Premium Plan" to remove ads is also available
* All features are available in the free version

■ Development & Support

Please submit your feedback and requests through the support section within the app or on the developer's website.

We will continuously update the app based on user feedback.