I worked for Apple retail for several years and I wanted to clarify your suggestion of an Apple Watch. There are two types, cellular and non-cellular. I believe you are suggesting the cellular version, and I wholeheartedly agree. The cellular version allows you to reach emergency services and make calls without the need to have your iPhone nearby. It does cost more, for both the watch and the cell service, but the first time you truly need it is when you learn it’s worth every penny. It’s also more stylish than those fall detector buttons.