I just picked up
Mage Gauntlet for iOs. It released today and is on sale for a couple of days, $2($3).
There are a few games that claim to be the closest thing to zelda on iOs, this doesn't claim that but it really is. The protagonist Lexi is charming in her resolve and the gameplay really is remeniscent of Link to the Past, as are the delightful graphics. The spell mechanics are great and the control scheme is a clear example of understanding the platform its built for.
Initial release is iphone/touch but the first update will bring proper universal (ipad) support and right now it plays great at 2x anyway because of the neat controls. Next update will support custom music from your library too in place of the sweet chip tunes.