I develop iOS apps professionally. Sometimes upon completion, I am urged to develop an Android app that is similarly functional both in UI and code behind logic

I develop iOS apps professionally. Sometimes upon completion, I am urged to develop an Android app that is similarly functional both in UI and code behind logic. I can get there, but it's never, ever fun. Employers need to wisen up and not expect mobile developers to be masters across these dual platforms. Plumbers don't do electrical work, paramedics don't chase criminals. I like to browse iOS/Android mobile dev job descriptions for fun, and I grit my teeth when it is expected that you be a master at both. Not a chance, everything moves too fast.