Can confirm the chat issue on android, I've got the S4, latest android, the icons will drop to a second line if they don't fit on 1. Not a huge issue for me. I've only just noticed that the air view on my s4 works with nodebb on certain aspects of the site. It only brings up the tool tips, but it's pretty bloody cool. I've only been able to use it on flipboard in the past.
Recall Julian mentioning that it's either difficult or impossible to determine where a keyboard is on a android phone, with iOS you know the keyboard size, but android, multiple keyboards, heights, screen widths etc makes it harder. Not sure on the best method for this apart from trying to replicate a messaging app. But even that isn't easy. Even Apple get it wrong. (Try leaving a long review on the App Store, after about 9-10 lines you can't see your text)