It's unclear to me why the Apple Watch is better here. It needs to be charged daily, so people are certainly taking it off. Anything that you take off might not be on when you have an accident. Maybe I'm a weirdo, but if I'm sitting along in my house, I don't have my watch or phone on me. They are both useless to report that I've fallen and I can't get up.

What's the state of the art with "Hey Siri, I've fallen and I can't get up"? That sounds like something that, if coded, is always there for you if you need help. I suppose there could be some sort of gas release that renders you unable to speak, but on the other hand, that seems rare. If you fall down the stairs, that sounds like it would work, and you don't need to remember to wear anything.

Make one of those beepers waterproof and hang it off the bottom of their shower curtain.