I actually have a friend who is working on an app to notify authorities when the wearer of a bracelet device dies or is indicates an irregular beat.
He tried a check in method - you check in every week or every other day or every day. But if you forget you may have a problem with a false 9/11 call. LOL
Is that app for the isatch? Doesn’t it already have a heartbeat monitor in it?
You wouldn't bruise without a heartbeat, but lividity can make an injury look a lot like a bruise.