Whist - Expert AI is a free iPhone game developed by NeuralPlay LLC. It allows players to play with the Whist rules of their choice against a challenging AI opponent.

The game comes with a range of features to enhance the gameplay experience. Players can receive hints, undo moves, and view statistics to track their progress. Additionally, the play review feature allows players to step through the play of each hand, enabling them to review and improve their strategies.

One unique feature of Whist - Expert AI is the play checker, which allows the computer to check the player's moves throughout the game and highlight any differences in strategy. This can be a valuable learning tool for players looking to enhance their gameplay skills.

Other features include the ability to play a fixed sequence of predetermined deals, claim remaining tricks when your hand is high, replay hands, autoplay hands, skip hands, and play offline.

With rule customizations such as determining trump by the dealer's last card or using alternate suits, Whist - Expert AI offers players the flexibility to play the game according to their preferences.