If you're on Android, the Play Store (https://play.google.com/store/apps/details?id=org.krita) will tell you it's not compatible with your Android phone.

This actually appears to be false! I downloaded the v8 ARM APK directly [0] and it started up and is working fine.

Enjoy :)

[0] https://download.kde.org/stable/krita/5.1.5/

Thank goodness for side loading.

Edit: @hallarempt, naturally it isn't perfect on a phone screen, but still works. A mobile-native version would be cool but this is still a lot better than any other Phone-oshop tools I've tried! Kind of depressing to be told it's "incompatible" when in reality it's functional with some limitations.