I came upon an interesting comparison of two mobile sidebar menus today. One of them ( https://events.google.com/io2016 ) has plenty of room for fingers to tap, while the other ( http://www.culturenorthernireland.org ) feels a bit cramped. It's the little things.
BTW - If you haven't experienced a progressive web app yet, that's what the Google site is. Check it out on Android for the full experience.