A GPS beacon for the elderly?

Question

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Hello!
My next of kin is elderly. This leaves its imprints on his behavior and gives cause for concern. I would like to protect myself from looking for a relative all over the city, if he suddenly forgets his address.
Maybe someone faced such a problem, and maybe someone can tell. For people who have not encountered these incidents - if there are good answers here, bookmark the page. I myself could not even think that my grandmother would become like that.
Is there a GPS beacon for the elderly on the market that meets the following requirements: -
compact size. Ideally, it should be a "keychain" for keys. At least have a similar shape.
-have a GSM module. SIM card slot (microsim, etc.), with the ability to determine the location by cell towers. And for other requests.
- long battery life.
- the possibility of both constant "control" and "point" by sms requests or via the Internet.
Let it be expensive and with difficult delivery, do not feel sorry for any money.
Thank you!

Answer 1

GPS beacons are expensive. I did it easier. I bought a cheap Android phone (there is a GPS module in almost every phone).
Installed Avast anti-theft on it.
Now I can see where the person is at any time. Through the site, or from your phone.

Answer 2

I would advise you to use the GPS tag app on your smartphone , and monitor your movements using the free GPS Trace Orange service .