Command
Command is team management software for FIRST Robotics teams. Teams use it to run their calendar, track attendance and volunteer hours, and keep members and parents informed.
What this site is
This is the Command registry, the service run by Command's developer. Each team runs its own copy of Command on its own server. Each copy checks in with this registry so the developer can keep count of the teams using Command and confirm they follow the software license. Nothing on this site is for the general public to use.
Why it asks for Google sign-in
The registry has a private dashboard. Google sign-in is used only so the developer can sign in to it. The app reads just the account's email address and name, to confirm the account is the registry owner's. It does not read email, contacts, files, or anything else in a Google account.