chessgenius by Richard Lang is good and gives hints.
Shredder by Stefan Meyer-Kahlen is good and has built in tactics puzzles.
Chess Apps that do this...
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Thank you. I'll try them out.
Any iPhone or iPad app that:
(1) give hints for moves in games you play against the computer when prompted; or
(2) are decent for practicing tactics?
I heard (too much, actually) about that Magnus app, but I don't know if it does any of the above.