Here’s where @darren discusses it:
I agree, my Thunkable Live view would have a header across the top. That header is much less noticable on my android tablet than my iphone (which also has a footer - ugh), but it is definitely there. It could be that Darren is downloading APKs and running them? Anyway, I’ve tagged him, and maybe he’ll be kind enough to reply. 
Hi @darren ! Love your videos!