iOS Practice

I'm working on a very tricky client project [iOS] at the moment and decided I needed to get some practice with the basics of iOS icon design. I've never really done it before so these are some of my first attempts.

Check out the fullview, I tried to make sure things looked beautiful at the full resolution :3

Critique and stuff from all of you iOS pros out there would be awesome, I'm new to this but don't hesitate to tear these apart.

Oh and here's a download for iPhone, let me know if you want any other sizes