ColorStrokes for iPhone by MacPhun LLC is a great photography app to alter the colors of your photos or paint new color to create a piece of art.
Coming from a professional Photoshop retoucher, I found it incredibly intuitive and easy to use on my iPhone. I’ve used similar apps in the past, but the experience wasn’t fluid and at times frustrating. ColorStrokes makes painting your photos fun. I especially liked the level of customization and attention to detail:
Sepia or cool tone background instead of the standard black and white
Preset filter effects
Custom opacity and softness of brushes
Zoom window to see behind your finger
View mask mode
Here is a before & after of a recent ColorStrokes macro creation I shared on Instagram.