The Tenhou.net client is a free downloable application provided by Tenhou.net itself. Any user may download and access the client. However, only registered and paid subscribers may play games through the client, when ranked higher than 6-kyuu 「６級」.
Unlike the browser application, the client has additional features:
- User modifications and customizations
- Users may customize the client to display different backgrounds, sound effects, and music
- Players have access to more detailed statistics
- Replay options
- Every tile, including those in the wall, may be revealed.
- Replay saves
- Unlike the browser, replay links are accessible indefinitely
- Tile shifting
- Players may move around tiles in the hand, as if they were real tiles. A tile sort button is also included.