App Store
Version 2.0.3 · 2026-10-27
Minor bug fixes.
Too little checked to say Store information only. We haven’t analysed this app or read its reviews yet.
Not yet tested.
The store currently lists version 2.0.3, updated 2026-10-27.








Store screenshots supplied by the developer.
You can play mahjong, but you cannot call the score yet. This app is for you.
Enter your hand and it shows not only the score, but why: the full fu breakdown, step by step. Rin teaches from the rules onward, so you learn it instead of memorising a table.
What is inside
- Score calculator with a full fu breakdown
- Fu drills, with a notebook of what you got wrong
- Lessons: rules, fu, han, scoring
- Score tables for dealer and non-dealer, tsumo and ron, 3-player too
- Point-stick tracker that handles honba and riichi sticks for you
- Score book with uma and oka settlement
- Mahjong puzzles
- Dice for the real table, and Chinchiro with full hands
- Play Chinchiro together: share a 4-digit code, one bowl on every phone
No gambling. Chinchiro is scored in points only. There is no wagering and no currency.
Premium (optional) removes ads and adds tactics lessons and dice skins.…
From the developer’s store description.
For developers and the curious
The evidence, sources, measurements and versions behind every label above.
No review analysis published for this app.
“Not assessed” means we could not measure it. It is never a zero and never a pass.
No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence, not a finding.
Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured
Not yet tested. No analysis has been run for this app, so there is no version or date to report.
Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.
Minor bug fixes.
rin-mahjong-parlorWhat the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.
From the store listing. Billing terms are read from each purchase’s name — the stores don’t publish them — so treat them as a strong hint, not a disclosure.
Not yet tested. No analysis has been published for this app, so there is no method to describe for it yet. A missing label is not a clean bill of health: it means nothing has been read, not that nothing is wrong.
Write to [email protected], or use the form. Name the finding, the app version and the evidence that needs correcting. Factual corrections are free and never depend on buying anything.