The best answer is a plan made while you're still well. Pick one person who checks on you on a rhythm, even a simple morning text where two missed days means they come over, and give them a key. Set your phone's emergency info (allergies, medications, contacts) so it shows on the lock screen, and learn how to call for help hands-free or with the emergency SOS shortcut. A fall-detecting alert button helps if you're often alone. It's a small amount of setup that decides who finds you.