Riichi Mahjong Calculator, featuring hand efficiency calculation, and more.
About this app
Riichi Mahjong Calculator, supporting features such as hand efficiency, meld hand efficiency, winning hand analysis, and score calculation for fan and minipoints.
- Hand Efficiency: Includes tile efficiency, good-shape tile efficiency (for one-shanten only), and backwards strategy.
- Meld Hand Efficiency: Tile efficiency for chow, pung, kong, and pass; includes good-shape tile efficiency (for one-shanten only) and backwards strategy.
- Winning Hand Analysis: Defaults to Mahjong Soul/Tenhou rules, with customizable rules to some extent.
- Score Calculation By Fan and Minipoints: Defaults to Mahjong Soul/Tenhou rules, with customizable rules to some extent.
Licensed under MIT, by ssttkkl.
What's New in v1.1.2
Imported from the F-Droid repository index.
Version history
Aug 7, 2025 · 30.6 MB · Android API 24–35 · code 10102
Imported from the F-Droid repository index.
SHA-256 7a1a2bd3a9372dfda8b0661fee0bfcadfa1f6fdca8b9d5185acce2356f5f8269
Apr 22, 2025 · 3.4 MB · Android API 24–35 · code 10014
Imported from the F-Droid repository index.
SHA-256 e8bb350eaf591d715342c859833881276dcaf2d7e28ddb8a61af4b780c1684ae
Apr 9, 2025 · 3.4 MB · Android API 24–35 · code 10013
Imported from the F-Droid repository index.
SHA-256 65ed134c48437c2c543e6af6ff8d64cfa8e00635dafecb6e6a2f49db5373e8f8
Will it run on your device?
92%
- Runs on a broad range of modern Android versions.
- Multiple CPU architectures are covered.
- Aligned with the latest Android target SDK expectations.
Installation Guide
Open Settings on your Android device
Go to Security → Unknown sources (or Install unknown apps)
Enable "Allow from this source" for your browser or file manager
Open the downloaded APK file from your Downloads folder
Tap "Install" and wait for installation to complete
Launch the app from your home screen
Make sure to re-enable Unknown Sources restrictions after installation for security.
How to install this safely
How to verify the file you downloaded
Before you install anything, confirm the file is the one described here. On a computer, run shasum -a 256 your-download.apk (macOS or Linux) or certutil -hashfile your-download.apk SHA256 (Windows), then compare the output character-for-character with the SHA-256 on this page. If a single character differs, the file is not the build we recorded — delete it.
What the signing certificate proves
Every Android app is signed with a private key that only its developer holds. The fingerprint on this page is a hash of the matching public certificate, and it proves continuity rather than identity: it tells you a build came from whoever signed the earlier ones. Android enforces this at install time — if a package claiming to be io.ssttkkl.mahjongutils.app is signed with a different key, the system will refuse to install it over your existing copy. A fingerprint that changes between releases is worth pausing on, because a repackaged app that has been modified by someone else cannot keep the original signature.
How to roll back to an earlier version
If the current release misbehaves, 1.0.14 is the last build before it. Android will not install an older version code over a newer one, so you must uninstall Riichi Mahjong Calculator first — which clears its local data unless you have a backup. Reinstall the older APK only if its signing fingerprint matches the build you already trust, and check the API range: an older release may target an Android version your device has moved past.
Why we list sources instead of hosting everything
The official store channel is almost always the right choice: it updates automatically and carries the publisher's own distribution guarantees. A direct APK is useful when a device has no store access, when a rollout has not reached your region, or when you need a specific version — and only when the publisher has authorized that copy. APKBrowse does not list pirated, cracked, or unauthorized rebuilds of Riichi Mahjong Calculator, and a listing is removed when the evidence for it stops holding up.
Get Riichi Mahjong Calculator
Every source we list for io.ssttkkl.mahjongutils.app is legality-reviewed. Pirated or cracked builds are never offered.
Other sources
F-Droid listing
officialF-Droid builds this app from source and signs it. This is its official listing, with older builds and full release notes.
Source code
verified publisherThe upstream repository this build is compiled from.
We check legality and signature continuity, but device behaviour still varies. Install at your own discretion.
App Information
Security Verification
We record provenance; we do not run malware scans. Verify the hash yourself before installing.
SHA-256 Hash
7a1a2bd3a9372dfda8b0661fee0bfcadfa1f6fdca8b9d5185acce2356f5f8269
Signing certificate
5c39f22ed1192933884426cc8cd14f3302f0d481573c056a66f0a5bec11e7186
Permissions Required
What each permission lets Riichi Mahjong Calculator do. A highlighted one is worth a second look — not necessarily wrong, just worth asking whether this app needs it.
Previous Versions
The signing certificate fingerprint for this release is on record, so a build that does not match it did not come from this publisher.
More Education apps
More from F-Droid
Report a problem with this listing
A listing is only as good as its corrections. If a source is broken, a signature looks wrong, or this app should not be here, tell the moderation team.