Dying alone: what safety measures are feasible?

I got an message from Bobsmom101:

While up in the attic changing the HVAC filter, it occurred to me that I (73 y.o. and live alone) really need a way to call for help to avoid the scenarios in [Dying alone: what safety measures are feasible? ].

I don’t really need the expensive “Life Alert” monitoring systems, just a button to push that calls 911 when the dodgy hip finally gives out. Of course, there is a bewildering array of smartwatches that apparently will fill the bill.

All my gadgets are Android based, so I’m eliminating Apple. I’m looking at models from Garmin, Samsung, and Citizen’s but they all seem to have some serious flaws (short battery life, small print, inadequate documentation, etc) per the Amazon reviews. I’m hoping that some of you on the Board with experience in this technology can recommend a model that has worked for you. Thanks!

I replied that I would post her question here and hope someon shares their insight. It is a topic many people wrestle with and I wonder if the smartwatches that are now on the market, are an actual working solution- they just seem too complicated, too fancy. Smart watches seem designed to be sold at a particular price, rather then to actually help people in our situation.