NZ personal alarm
https://mymedicalalarmnomonthlyjournal.almoheet-travel.com/why-a-medical-alarm-with-no-monthly-fee-makes-sense-for-seniors-in-new-zealand
My grandad has this NZ personal alarm clipped to his belt. It's got a simple button you press if you fall or need help, and it calls a support center. He feels a lot safer living alone, knowing he can get assistance quickly. The battery lasts ages, so he doesn't have to worry about charging it all the time.