Another thing in addition to everything else mentioned, that would help selling the app, is to be more active on their socials like Instagram and Youtube, Twitter would be good too. Posting frequent quality art of their users via their hashtag and provide some kind of user handbook like procreate, I see many new users asking about it all the time. Making frequent short tutorial videos, Tipps&Tricks and actually show off all the stuff, that ASP can do over other apps in the appstore! And promote new updates in advance everywhere, like procreate does.
I know marketing is not easy, but it's so important and ASP definitely lacking lots in that department. It would probably even pay off, thinking about hiring one more person just to care about social media and marketing? Also maybe a Patreon page or something where users can make donations to support the team abit would be helpful too
I also always promote the app wherever I can, and would love to see it getting the recognition it deserves!😁 It is the only app I need and use for painting nowadays and I just love it alot.
Procreate definitely in favor of apple. I love and understand animation features of it, the only reason why I still use it sometimes, but I never seen any users actually requesting for 3D painting before they just decided to implement it, kinda odd, even tough it's cool, they are very behind in very basic features that's been requested for a long time, but they are just great at advertising themselves