I use Snapseed on Android. It's a practical app with many photo editing tools
I like how I can edit my photos here,
Facetune - Facetune is a fun and powerful portrait & selfie photo editor!
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 .
Meitu - Meitu is a standalone photo editing application that offers almost all those features and photo editing tools that lets the smartphone users personalize their photos like a professional makeup artists and fashion designers.
PicsArt - Explore 100,000,000+ awesome images and photos on the web
Touchretouch - “…there's no easier way to remove unwanted items from your images.
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.