Comparison

JongBook vs MahjongDiary

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

JongBook

Effortlessly track Riichi mahjong scores and player statistics. This app eliminates the need for paper and calculators, automatically calculating net results and offering detailed insights into game history and player performance. Manage groups, share results, and enjoy deeper analysis with optional Pro features.

Highlights
  • Automatic score calculation
  • Supports 3 and 4-player mahjong
  • Player group management
  • Shareable score sheets
  • Detailed player statistics
  • Export results as image
Read full description

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

About

MahjongDiary

Features
Read full description

Smarter scorekeeping and session logging for mahjong. Enter raw points and we'll calculate scores, ranks, and your balance automatically. Record tips and table fees with each game so you always know your true profit and loss. Build a clear history of your play—compare players with tag rankings, and review friends' published results when they share them with you. Key features • Auto-calculate scores & ranks from raw points Just enter the points—final scores, ranks, and balances are computed instantly. No more manual math. • Full balance tracking Include tips and table fees so your totals reflect real wins and losses. • Visualize your results See monthly and yearly balance charts and average ranks. Break down four-player and three-player games separately. • Tag stats & rankings Tag friends, guests, and games, then rank everyone in your tagged games or your tagged players by balance, average rank, top rate, last avoidance rate, and more. Filter by period, game style, and minimum number of games. • Friends' stats View the monthly, yearly, and all-time stats friends publish for you, or check the games recorded on your own device. Visibility is under each player's control—public to friends or hidden. • Easy friend adds with QR codes Show your QR code or scan theirs to send a friend request. Account ID search is supported too. • Friend sharing for games Add friends and share game data. Manage your own sessions and join games shared with you. • Simple guest player registration Register table mates as guests and organize them with tags. • Saved default rules Keep often-used uma, oka, tip rates, and more so setup stays quick. • Account sign-in Sign in with Apple or email so your data stays safe and synced across devices. Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

JongBook4 screens
MahjongDiary4 screens

Verdict

The call

The clearest difference is update cadence: JongBook at every 6 days against MahjongDiary's every 2 weeks. On price, ads, in-app purchases and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. JongBook sells 2 in-app purchases, starting at $6.49 per month and MahjongDiary sells 1 in-app purchase, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

JongBook ships an update every 6 days, MahjongDiary every 2 weeks. The most recent releases landed on October 27, 2026 and October 24, 2026 respectively.

Scorecard1 real difference · 7 level
JongBook versus MahjongDiary: the parameters behind the verdict, then further details
ParameterJongBookMahjongDiary
PriceFreeFree
Positive reviews100.0% of reviews—
Update frequencyEvery 6 days — betterEvery 2 weeks
AdsYesYes
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPadiPhone, iPad
Requires iOS17.4 — better17.6
Further details — not scored
Size8 MB26 MB
Age rating9+4+
Developerryo yoshitsuguDaichi Itokazu

In-app purchases

2 purchases

JongBook

Subscriptions2
  • JongBook Pro (Monthly)$6.491 Month
  • JongBook Pro (Yearly)$50.991 Year
1 purchases

MahjongDiary

Subscriptions1
  • Remove ADs$0.991 Month

Questions

Is JongBook free?
JongBook is free to download, with in-app purchases available.
Is MahjongDiary free?
MahjongDiary is free to download, with in-app purchases available.
Do JongBook or MahjongDiary have ads?
Both JongBook and MahjongDiary show ads.
Which is updated more often, JongBook or MahjongDiary?
JongBook ships an update every 6 days, and MahjongDiary every 2 weeks. Most recently, JongBook was updated on October 27, 2026 and MahjongDiary on October 24, 2026.

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