I have a Pro account on Android version 6.0.1 (you have no such item in the menu above) and I have some problems with it:

1) the app Doit.im on my phone asks me every time to correct timezone (which is "inconsistent" on my device). I do it in web, I see that in web version my time zone is indicated correctly but there are no changes in the app on my phone.

2) there is no synchronisation between my account in web and my account on my phone: I can't see any of my tasks in web.