Ask HN: Should I worry about Android any more?

I'm currently working on a mobile app, and, naturally, I want to reach out to as big crowd as possible. However, this is a one person effort for now, and I do not have capacity (nor much desire) to maintain 2 completely different platforms all by my self (IOS swift, and Android Java), it's simply is not practical (although I have created a prototype for both). I was seriously considering investing into becoming proficient in React Native to be able to create really cool UX for both platforms. And recently I found out that AirBNB just ditched their React Native in favor of Native (good that they can afford it). I also have a millennial son, who is an IOS coder, and he tells me that all kids in college have iPhone these days. My other son in high school says the same, every kid in his class has an Apple device. So, my son who is an IOS developer says not to worry about Android and to become proficient in IOS only, because that's the only one which is going to matter on the long run, and do not even bother with React Native. I'm not looking to start another religious war "Emacs vs vi" -- I'm looking for an evidence based advice. I'd appreciate any comments, thoughts, suggestions.