Unfortunately, I get stuck at the very beginning of the app. I log in via google, confirm, want to register as a new user, give my consent to stuff like that and then I should enter my weight length gender thing and there I can only choose the gender, otherwise no button reacts. Then I can't get any further in the process. I have to enter the data but it doesn't accept it. I can't register at all. It works on my wife's Android, but not on my iPhone. What can I do?