I had to look up the phrase "expert beginner" as I was unfamiliar with it. I found it interesting. This was a good read for anyone else who might be unfamiliar with the term:
>Apple and Google want to show off the latest features in iOS and Android, so incorporating these into your app will make sure you have the best chance of getting featured.
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I think it's not fair not included Windows here. Windows 10 also have excellent features.
Windows has a 2.5% mobile market share. If you're JUST launching an app you will not focus on Windows. You'll be happy you got both iOS and Android to work.
"How can I become a master procrastinator"
OR
"Websites that can steal all my free time"