What are some alternatives?
When comparing Affinity Photo and Touchretouch, you can also consider the following products
Adobe Photoshop - Adobe Photoshop is a webtop application for editing images and photos online.
Adobe Photoshop Express - Easily edit and share your photos in no time!
GIMP - GIMP is a multiplatform photo manipulation tool.
PicsArt - Explore 100,000,000+ awesome images and photos on the web
Pixelmator - Pixelmator is an image-editing application for Mac and iPad.
Sketch - Professional digital design for Mac.