Music App Login & UI Fixes

I have a live mobile music app that needs a short round of improvements before the next release. The highest-priority item is to add Sign in with Apple alongside Facebook Login so users can authenticate seamlessly on both iOS and Android... (Budget: $30 - $250 USD, Jobs: Android, Android App Development, Android Studio, iPhone, Java, Kotlin, Mobile App Development, Mobile Development, User Interface / IA, XML)