So if your looking for perhaps a website or app to use on your phone to edit a picture, here are some I recommend!
Pizap - Easy to use make edits, designs and collages!
Pixlr - More for those who are designing outfits so you can use layers! (App avaliable too.)
Picsart - You can get it off the Windows Store if you have an Windows 8 computer. Also an app is avaliable to use too, which has more features.
These are a few I use, if you know any other ones, comment!