The Scrummaster or somebody else moderating the poker session
at first starts following website:
http://scrumpokersession.azurewebsites.net
For beginning a session ID is created and the session started. With this ID all the members register to this session. After that the backlog items can be groomed one after the other.
After one item is groomed the moderator resets the current votes and the next voting can start.
After the grooming session the members just can close the app or the moderator removes the members himself.