How does the LibreLinkUp app work?
When the FreeStyle Libre app receives glucose data from the FreeStyle Libre sensor, it transmits the glucose data to the LibreView cloud. The FreeStyle Libre app allows the FreeStyle Libre user to invite family, friends, and caregivers to receive glucose data. These family, friends, and caregivers can install the LibreLinkUp app on their phone, accept the sharing invitation, and then view glucose data and receive glucose notifications from their Connections. 1
Reference:
1. FreeStyle LibreLinkUp caregiver user guide.