My partner had a discussion with his co-worker about how she and her husband have a tracker app on their phones. They essentially let you see where your partner (partner's phone) is at all times. They say it's so that if one of them doesn't hear from the other or there's an emergency, they'll know where they are. Or, just to have an idea how far from home one is while the other is cooking dinner and wants to have it ready. I think that's all BS. It seems like a nosy and controlling way to monitor your partner. It seems like a distrust kind of thing. Nothing has ever happened that either of us is concerned about where the other is and why and for how long. All of a sudden my partner is proposing this. I've said no but he keeps bringing it up.
Your instincts are screaming valid questions louder than any alarm: "BS," "nosy and controlling," "distrust"—you’ve hit the nail squarely on the head.