The GroupTrack feature allows groups to share locations and messages with each other without having to communicate with each member individually and then relay messages. It works with cell service, of course, but also works off-grid, showing each members' location on a map and sharing messages with the entire group through members’ Bivy Sticks. For the feature to work as intended, each member off-grid needs their own Bivy Stick. However, invites can be sent to email addresses and phone numbers, so those back home can be included also.