With your chess program Fritz you will get a six months Premium membership for the ChessBase Web Apps.
Login with your account at
https://account.chessbase.com/en
Now click directly on your account name.
That will open a site where you can “Extend membership with serial number”:
Click on this and enter your Fritz program key in the upcomig dialog.
The direct URL is https://account.chessbase.com/me/membership/enter-sn
