What is the Ultimate Bridge game, how does it work?

According to the introduction of Mokort, Ultimate Bridge is a Card game on the Android platform. There is currently a 3.3.0 version released on Mar 25, 2020, you can see the details below.

Ultimate Bridge is online bridge card game. Fulfill bridge conventions card and play contract bridge free, in variant of single table 4-hands bridge game or tournament, against other people (there aren't robots). You can watch all active bridge games and chat with bridge players in room.
Ultimate Bridge app features:
- Login using Facebook or Google account
- Fulfill bridge bidding conventions card
- Join to individual or pair tournament (duplicate bridge IMP or MP scoring system)
- List all active tournaments
- Watch active tournaments
- Create your 4-hands table
- Join to some active 4-hands table
- Play contract bridge game
- Chat with other bridge players
- List all active tables
- Watch active tables
- Send and receive messages
- View player profile
- Invite friends
- Scoreboard daily, weekly or monthly (only for tournament rating)

Facebook: https://www.facebook.com/ultimatebridge
Twitter: https://twitter.com/ultimate_bridge

Publish version 3.3.7.
Small bugs are fixed.