My son has a greenlight account with me and a separate account with his dad but cannot be logged into both on the app at the same time. I am also not able to use the crash detection, driving reports or SOS alerts function that I pay extra for because his phone number is already linked to his Dad's green light account. If the app would allow multiple accounts to be logged in that you could toggle back and forth between and being able to link two accounts with the same number it would be a huge benefit to customers who have children going back a forth between two homes.