I use Snapseed on Android. It's a practical app with many photo editing tools
I like how I can edit my photos here,
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 .
ColouriseSG - Deep learning colouriser prototype made for old Singaporean photos.
PicsArt - Explore 100,000,000+ awesome images and photos on the web
Image Colorizer - Colorize black and white images automatically
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Colorize It - Use deep learning to colorize black and white photos