# Riichi Mahjong vs Decoder Terminal

The clearest difference is in-app purchases: Decoder Terminal at none against Riichi Mahjong's 5. Decoder Terminal also leads on update cadence (daily vs every 5 weeks). Riichi Mahjong's advantage is device support (3 vs 1) and iOS requirement (13.0 vs 18.6). On price and ads there is nothing between them.

Both are free to download. Riichi Mahjong sells 5 one-off in-app purchases. Decoder Terminal asks for nothing beyond the download.

Riichi Mahjong ships an update every 5 weeks, Decoder Terminal daily. The most recent releases landed on October 29, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Riichi Mahjong | Decoder Terminal |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (444 ratings)](https://appshunter.io/ios/app/riichi-mahjong/id1503415829/reviews)** | — |
| Number of ratings | **444** | — |
| Positive reviews | 78.8% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | Yes |
| Update frequency | Every 5 weeks | **Daily** |
| Monetization | Free with in-app purchases | — |
| Size | 127 MB | 6 MB |
| Requires iOS | **13.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Flyout Studios LLC](https://appshunter.io/developer/1503415828) | [Twinning Trails LLC](https://appshunter.io/developer/1853666666) |

## What reviewers say

### Riichi Mahjong

[App page](https://appshunter.io/ios/app/riichi-mahjong/id1503415829)

Experience authentic Japanese Riichi Mahjong with comprehensive tutorials, customizable rule sets, and engaging singleplayer and multiplayer modes. Practice your skills with advanced AI or in a unique discard reading game mode. Enjoy AR mode for an immersive experience and save/share replays.

**Highlights:** Learn to play tutorials, Multiplayer and singleplayer, Multiple AI opponents, Configurable rule sets, Replay saving and sharing, Augmented Reality (AR) mode, Guess the wait game mode

**Features:** macOS Compatibility

**In-app purchases (5)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Small Tip | $0.99 | one-time |
| Medium Tip | $1.99 | one-time |
| Custom tile designs | $1.99 | one-time |
| Large Tip | $4.99 | one-time |
| Huge Tip | $9.99 | one-time |

**What reviewers like**

- 👍 Great for learning Mahjong
- 👍 Intuitive UI and design
- 👍 No ads, honest app
- 👍 Smooth gameplay and stable
- 👍 Good computer player difficulty

**What reviewers complain about**

- 🐛 Dora calculation sometimes wrong
- 🐛 Glitches with high scores
- 🐛 Powers don't work anymore
- 🐛 Bug with furi ten indication
- 🐛 AI players too fast in multiplayer

**Reported bugs**

- Dora calculation seems wrong
- Game times out around 4 million points
- Keys stop working
- Save file did not contain a valid mahjong game
- Powers don't work anymore

**Requested features**

- Hold zoom option with reset button
- Yaku explanations in French
- One-page illustrated yaku patterns
- Setting to hide best discards and winning tile count
- 3 player mode


### Decoder Terminal

[App page](https://appshunter.io/ios/app/decoder-terminal/id6777221949)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Riichi Mahjong free?

Riichi Mahjong is free to download, with in-app purchases available.

### Is Decoder Terminal free?

Decoder Terminal is free to download, with no in-app purchases.

### Do Riichi Mahjong or Decoder Terminal have ads?

Both Riichi Mahjong and Decoder Terminal show ads.

### Which is updated more often, Riichi Mahjong or Decoder Terminal?

Riichi Mahjong ships an update every 5 weeks, and Decoder Terminal daily. Most recently, Riichi Mahjong was updated on October 29, 2026 and Decoder Terminal on October 8, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*