I've got a love/hate with BlindsUp ($10) iPad/iPhone. It's very feature-rich (can store various chipsets, blind structures, seasons/prizes, players imported from Contacts, etc). It allows you to load images of YOUR chips and customize background and layout. All that goodness, but it's not the most intuitive... I've been frustrated a couple of times doing what should be simple tasks. Still, it's the best all-around Poker Tourney app I've found...