When comparing Pixel Art Pro vs PixiEditor, the Slant community recommends PixiEditor for most people. In the question“What are the best pixel art / sprite editors?” PixiEditor is ranked 17th while Pixel Art Pro is ranked 23rd. The most important reason people chose PixiEditor is:
It's actively developed on GitHub under MIT license, and it's totally free.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Export as animated gifs
Pro Share animations as stickers in iMessage
Pro Frames and layer support
Pro Allows import/export from sprite sheets so you can edit existing artwork on your iPhone/iPad
Pro Free and open-source
It's actively developed on GitHub under MIT license, and it's totally free.
Pro Very easy to use
Pro Stylus support
It has decent stylus support, erasing and drawing
Pro Active development
Pro Multi-document editing
Interface is dockable and supports editing multiple documents at the same time, even side-to-side.
Pro Clean and readable interface
UX is very similar to popular editing tools like photoshop, so getting started is easy.
Pro Multi-document edititng
Interface is dockable and supports editing multiple documents at the same time, even side-to-side.
Cons
Con Limited toolset
Con iOS only
Animated stickers sent to android devices do not animate on android side (animation not yet supported on android).
Con A little buggy
It's still in early development stage, so there are some bugs.