JongBook: Mahjong Score Sheet
ryo yoshitsugu Finance iPhoneiPadiPod touch
JongBook: Mahjong Score Sheet is a free Finance app for iPhone and iPad by ryo yoshitsugu. Requires iOS 17.4. Updated October 24, 2026.
- Price
- Free
- on the App Store
- Size
- 8 MB
- Age 9+
- Updated
- Oct 24
- 2026 · v2.10
Screenshots
About JongBook: Mahjong Score Sheet
The paper score sheet from the mahjong parlor, now on your phone. Just enter the scores and JongBook calculates everyone's net results for you. No more pen, paper, or calculator for your Riichi mahjong nights. [Enter scores, get results automatically] - Enter each hanchan's score and net results are calculated automatically - Chip and table fee rules are all included, so you know the net results the moment you finish - Supports both 3-player (sanma) and 4-player mahjong - Looks just like a paper score sheet, so it's easy to pick up [Manage your regular players in groups] - Add the people you play with to a group and create a score sheet with one tap - Pick "same players as last time" and start right away - Rules are saved per group, so you don't have to enter them every time [Share score sheets with friends] - Invite friends to a group with a link and share its score sheets - Everyone sees the same stats on their own phone, anytime - Export results as an image and send them through any messaging app [Stats tallied automatically] - Group stats are ranked automatically, so you can see who's winning at a glance - My Stats brings together your results across all groups: totals, trend, placement, and how you do against each opponent - Switch between net and score, and filter by period or 3-player / 4-player - JongBook Pro unlocks even deeper analysis - Net trend (cumulative chart) - Placement breakdown, average placement, and 1st rate - Head-to-head (who is strong against whom) [Great for] - Regular home games with friends or coworkers - Anyone tired of paper score sheets and adding everything up by hand - Players who want to keep a proper record of their results - Groups who like a little friendly competition on the leaderboard [JongBook Pro (monthly / yearly)] - Create unlimited groups (free: 1. Groups you joined by invitation don't count) - Save unlimited score sheets per group (free: 10) - See every chart on the stats screen - No ads * Score sheets without a group can be created for free without limit * After reaching a limit, you can still view and edit all of your existing records JongBook is made by an independent developer. Feedback and requests in the reviews are always appreciated! Terms of Use: https://ryoyoshi29.github.io/mahjong-score-sheet-support-page/en/TermsOfUse.html Privacy Policy: https://ryoyoshi29.github.io/mahjong-score-sheet-support-page/en/PrivacyPolicy.html
What’s new
Version 2.10 · Updated October 24, 2026
[What's New] Bug fixes - Fixed an issue where the app could quit after you entered scores in a shared group's score sheet, and then fail to open Thanks for using JongBook! It's made by an independent developer, so a review would mean a lot.
App privacy
The developer, ryo yoshitsugu, reported these privacy practices to Apple.
Data Used to Track You
The following data may be used to track you across apps and websites owned by other companies:
- Location: Coarse Location
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
- Diagnostics: Crash Data, Performance Data
Data Linked to You
The following data, which may be collected and linked to your identity, may be used for the following purposes:
- Location: Coarse Location
- Identifiers: Device ID
- Usage Data: Product Interaction, Advertising Data
- Diagnostics: Crash Data, Performance Data
- Purchases: Purchase History
Used for: Third-Party Advertising, Analytics
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