21 ms·Billions of people have smartphones. How many of them use them to keep track of their loved one's movements?by Cipater 4y agoBillions of people have smartphones. How many of them use them to keep track of their loved one's movements?greedo 4y agoMy wife and I use Apple's "Find My" feature to keep tabs on when each other will be home. Makes it easy to time dinner so it's hot for everyone.brewdad 4y agoI personally know of at least 2 families. My guess would be millions.