A female friend told me she has one of those apps on her phone. Her DH is a driver and often works nights so she says she has it so if anything happens to him she would know where he was. But she also uses it at other times, e.g. she watched him stop off somewhere coming home once and asked him when he got back where he'd been and then when he said "nowhere" she was like well I watched you go here. I think her DH might have it for her too but I don't know if he uses it or not.
AIBU to think if it was him coming out with these kinds of comments we would all say it's controlling and weird? I was a bit 
when she told me.