I take a lot of pictures with my iPhone 4S, and I always get asked what photo editing apps to I use. The answer is always Snapseed from Nik Software.\rbrIve found it not only to be the easiest to use, but the app that offerers the most features I like when editing a picture.\rbrFor $4.99 you cant go wrong. The price is well worth what you get.\rbrIf you edit a lot of pictures on your iPhone or iPad then I highly recommend picking up Snapseed.