FROM a bunch of photography apps udated this month iris photo suite with 0.99$ have now been updated recently with layers blending technique.. where you can easily blend various images just like you do in photoshop and can create amazing effects...
Do give it a try...
http://itunes.apple.com/us/app/iris-photo-suite/id377598786?mt=8
Do give it a try...
http://itunes.apple.com/us/app/iris-photo-suite/id377598786?mt=8