I use Snapseed on Android. It's a practical app with many photo editing tools
I like how I can edit my photos here,
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VSCO - VSCO® is an art and technology company empowering people everywhere to create, discover, and connect. CompanyVSCO® is a trendsetting art and technology company that .
Snap Photo Editor - Snap Photo Editor – Collage Maker & Pic Editor created and published by CVInfotech for Android and iOS devices.
PicsArt - Explore 100,000,000+ awesome images and photos on the web
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Pixelmator - Pixelmator is an image-editing application for Mac and iPad.