Iife360 android app.
It tells me where anyone in our group is within about 15 feet but usually it's within 4 inches or so.
Free, and it back tracks a path throughout a 24 hour period. Up to a month if you buy the pay version.
I can tell which seat at our home kitchen table the wife is sitting in from 10,000 miles away.
We can find each other in Walmart or in Europe.
It alerts me, by email and text when the spousal unit leaves or enters a geographic circle I set the size of.
If she's coming home with groceries it let's me know she's within 500feet of the house and I can walk up from the shop and help her unload.
The pic is her walking the large rv park at Fort Benning Georgia. (she likes to splash in puddles, the river was too enticing. At least I'd know where she fell in....)
__________________
|