Polar Club - Group fitness app

Absolutely superb app we use here at the Martial academy Essex.

Installed this app but can't get it to open, Have signed up but received no notification for club log in, poor customer service unless Iam doing something wrong, any help on this! Update App keeps crashing! Can't use without wifi! The app has some nice features but due to requiring constant wifi not suitable . If they could add some of the features in this app to polar team IE preassinged heartrate monitors by number one through to how many would be nice. Why must this have to have wifi connection ,as some of our locations do not have wifi so we can not use very disappointed.also as instructor I keep having to sign in when I move to another screen very frustrating .would be nice if we could open the app just like the polar team app so much easier.dont think our club will be using this