Useful But
The application itself is almost average for a mobile program but it takes rather long sometimes for it to find another player, sticks an advertisement directly over the area that compares both sides, it fails to work in landscape mode, have a examine or review game mode, have time controls for the intervals between each move ( different than the Fischer method - for lames that like to move twice then let the clock run hoping you quit ) and is full of idiots who stare at the screen for forty seconds waiting for you to move, when they got the white pieces.
I think a small chat room would be a popular feature if added and a collection of puzzles available offline would be reasonable improvements BUT I SALUTE THE PRICE OF SOFTWARE, THE FLIP BOARD OPTION, THE ABILITY TO TYPE MESSAGES TO YOUR OPPONENT, etc.
Mister CK about
iChess (Free), v2.3