# Riverstone: Riichi Mahjong — Japanese Tile Game & Trainer

> Japanese Tile Game & Trainer (iPhone/iPad app by MatrixAI.)

- Source: https://appshunter.io/ios/app/riverstone-riichi-mahjong/id6816373973 (this page in markdown: same URL + `.md`)
- Developer: [MatrixAI](https://appshunter.io/developer/1879636240)
- Category: Games, Education, Board, Card
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 7 MB
- Languages: Korean, German (Germany), Russian, Vietnamese, European Spanish, American English, Italian, Japanese, Chinese (Simplified, China), Chinese (Traditional, Taiwan) and 2 more
- Released: 2026-10-20
- Data updated: 2026-10-30

## What is Riverstone?

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

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Riverstone Plus Monthly | $2.99 | per month |
| Riverstone Plus Annual | $19.99 | per year |


## Is Riverstone safe?

Not enough ratings yet to assess Riverstone.

## Is Riverstone legit?

Riverstone: Riichi Mahjong appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for Riverstone is 65 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 1 release)

### 1.0 — 2026-10-20

No release notes.

## Apps similar to Riverstone

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| --- | --- | --- | --- |
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| [Co Up: Co Tuong, Co The 3D](https://appshunter.io/ios/app/co-up-co-tuong-co-the-3d/id6802168612) | — | Free | Games |
| [RealMahjong!](https://appshunter.io/ios/app/realmahjong/id6766127047) | 4.2 (30) | Free | Games |
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All apps by MatrixAI: https://appshunter.io/developer/1879636240

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-10-30.*