Just because people are mentioning nobody finding them if they die or have a medical emergency - the Snug app is a daily check-in for people living alone. There are different levels - free and paid. The free one will text a contact if you don't check in. The paid level ($9/mo) will have someone call you to see if you're okay. If not they call your contacts and if that doesn't work they will call emergency services.
I have no affiliation with this app and I don't use it - just thought it was a great idea. There are other similar apps apparently.
Since my husband is older I expect one day to be alone. Although lately I'm worried I will die first -- I don't want that at all because he is disabled and needs me.