Riverstone: Riichi Mahjong
MatrixAI Games iPhoneiPadiPod touch
Riverstone: Riichi Mahjong is a free Games app for iPhone and iPad by MatrixAI. Requires iOS 17.0. Updated October 20, 2026.
- Price
- Free
- on the App Store
- Size
- 7 MB
- Age 4+
- Updated
- Oct 20
- 2026 · v1.0
Screenshots
About Riverstone: Riichi Mahjong
Riverstone is Riichi Mahjong, beautifully played. Enjoy Japanese mahjong at a calm, clear table on iPhone and iPad, learn every rule from zero, and sharpen your reads with a fresh discard puzzle every day. No account. No ads. No loot boxes. Play offline, anywhere. PLAY RIICHI YOUR WAY • Solo matches against three local bots: beginner is free, intermediate and advanced come with Plus • Quick East-round games or full Hanchan matches • Modern casual rules with red fives and open tanyao • Call pon, chi, kan and ron, declare riichi and chase dora • After every win, see the yaku, han and score behind your hand LEARN FROM ZERO • A guided academy takes you from the three suits to hand shapes, yaku, reading the river and scoring • Short lessons finish with a quick check question so each idea sticks • Discard drill: "What would you cut?" Test your choice, then learn why • Wait drill: find every winning tile for a ready hand DAILY RIVER • A new discard puzzle every day • Build a streak and share your result with friends • A Home Screen widget keeps your daily progress one glance away STAY MOTIVATED • Earn XP and level up as you play, learn and practice • Complete daily quests and unlock achievements PLAY NEARBY • Play with friends nearby over your local network • Join with a simple room code: no account and no internet needed • Nearby guests play free BUILT FOR EVERYONE • VoiceOver reads every tile by name • Supports Dynamic Type and dark mode • Designed for both iPhone and iPad RIVERSTONE PLUS Riverstone is free to download. Beginner bots, the core academy, the discard and wait drills, Daily River, nearby play and all your progress are free. Riverstone Plus is an optional subscription that unlocks: • Intermediate and advanced bots • The advanced academy chapters • The Defense Lab drill in the Dojo • Premium table themes Choose monthly or yearly, with a 7-day free trial on the yearly plan. Payment is charged to your Apple Account. Your subscription renews automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel it anytime in your Apple Account settings. Whether you are learning your first yaku or polishing your tile efficiency, Riverstone is a quiet place to get better at Riichi Mahjong, one hand at a time. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.matrixai.work/riverstone/privacy
Play today's Frostfire puzzle
Balance fire and ice: half of each in every row and column. A free daily puzzle from Fiplay, same board for everyone. It plays right here, no download.
App privacy
The developer, MatrixAI, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to Riverstone: Riichi Mahjong
Looking for apps like Riverstone: Riichi Mahjong? Here are 6 similar apps on the App Store. The highest rated is Agari — Riichi Mahjong (5.0/5), and all 6 are free to download.
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Mahjong War
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Gosai: Tile Puzzle
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Tengan: Riichi Mahjong Coach
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Riichi Anywhere
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RIICHI ORBIT: Mahjong
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Agari — Riichi Mahjong
5.0
| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| Riverstone: Riichi Mahjong | – | Free | October 20, 2026 | |
| Mahjong War | – | Free | Jul 9, 2026 | Compare |
| Gosai: Tile Puzzle | – | Free | Sep 5, 2026 | Compare |
| Tengan: Riichi Mahjong Coach | – | Free | Oct 27, 2026 | Compare |
| Riichi Anywhere | – | Free | Oct 20, 2026 | Compare |
| RIICHI ORBIT: Mahjong | – | Free | Nov 9, 2026 | Compare |
| Agari — Riichi Mahjong | 5.0 / 5 (3) | Free | Nov 8, 2026 | Compare |