I'd like to introduce you to TumbleDots: for iPod Touch, iPhone, iPad (regular + retina). It's free...and awesome. And needs your love to move up the ranks! ;)
You use your iDevice's accelerometer to tilt the board to move the gems to get matches of 3 or 4. Simple. Infuriating. Fun!
iTunes store link
This is my first (personal) iOS submission since Falling Up got pulled. Feels good to be getting back on the horse, even if I'm still a bit bitter. :) And...I have to say, iOS games are a harder market than flash games. Oy.