This makes sense: a recent Australian survey found that nearly one in five young people (18-24 years old) think it’s OK to track their partner whenever they want. Having grown up with the internet, gen Z are, generally, more comfortable sharing their data online; Snapchat, the social media platform notoriously most popular with younger users, has long incorporated location sharing with its Snap Maps feature.

For Alan, 75, it’s a practical measure: he and his partner mutually enabled location tracking on their phones many years ago. He says it’s useful for predicting when the other is on their way home – especially when working irregular hours, with lengthy commutes. Being able to follow each other’s journeys gives them peace of mind, and makes it easier to time the cooking of meals. “The other way we use it is if one of us spots that the other is in town,” he says. “We can ask them to pop into a shop to get something.”

Joanna Harrison, a couple therapist and the author of Five Arguments All Couples (Need to) Have, believes location sharing can threaten the “balance between independence and togetherness” that is important in all relationships, particularly romantic ones. “It would be a shame if these apps took away an opportunity to share the details of each other’s independent lives because they already knew them,” she says. “There’s also a part of me that feels that a bit of romance is lost when you know, to the second, where someone is. What about the satisfying feeling of longing to be met when you know someone is arriving, but you don’t quite know when?”