Hello HN, I'm creating an iOS app that I plan to release as paid, but I also would like it to be open-source so it can helpful to others and get help from other developers. My question is: is it possible for a paid iOS app to be open-source?
Yes you can open source a paid app. The licensing of the source you release just has to be compatible with the App Store licensing. If you go with a MIT license you'll be good.