Meh. When wifi is configured to NOT allow devices on the same network see each other (that’s what “guest network” or “client isolation” is) even iOS won’t help you.
What does affect some (especially some old) Android devices is when network has no Internet connection or has slow DNS responses - there is a very large domain name resolution (DNS) timeouts like 30…40 seconds that can’t be turned off (even when DNS resolution is not used by the app). But that mainly for the first sync to any given remote tablet. If you have a little patience to wait trough that timeout, it works faster after that.
Keep in mind that most Android devices used to run PractiScore are on 4…5 Android versions behind and Nook devices are on 9 Android versions behind (which is over 10 years old now).