When I try to access the calculator feature for In The Zone on VRC Hub, it says it requires an app update, however there is no update available. Am I doing something wrong, if not, when will the update be pushed to android?
I just tried and there was an update for android, seems to allow the calculator to work now 
It is available. The Google Play Store is buggy sometimes and you have to go out of the app download page and back in to see the update. Otherwise you should see it automatically update in the next day or so.
Thanks, the update showed up for me earlier today.
unistall it then downlad it again it worked for me