Ranked in these QuestionsQuestion Ranking
Pro Multi-platform support
Windows, macOS, iOS and Android.
Pro Has a lot of options for editing photos
It's a powerful, fully featured app and it's free.
Con Displays a dialog with some ads at the start
When starting up the app, there is a dialog that pops up containing advertisements, this can simply be closed, but will happen every time when opening the app. Sadly there is no way to remove these ads currently.