4: Picsay
Probably this is one of the oldest android app which lets you edit/retouch your images. With this app you can do many things like editing, writing, text, superimposing vector images, etc. This app also comes with a pro version which lets you do even more things.
Here’s what the developer says:
Spice up the pictures on your phone with this award winning photo editor!
Supports high resolution editing up to 13MP for devices that can handle it.
Sharpen, remove red eye, crop & straighten, distort, insert cutouts of other pictures, paint, make color splash out of black-and-white pictures, add text, word balloons, apply effects like Cross Process, Lomo, Vignette, faux HDR, Tilt-shift, Pencil Sketch, and much more.
