Not OP nor do I know how they're doing it but you could do this sort of thing with one of the many location tracking apps that have an API access to the data it

Not OP nor do I know how they're doing it but you could do this sort of thing with one of the many location tracking apps that have an API access to the data it collects. For example there's the Moves app you could use which provides one https://dev.moves-app.com/docs/api https://dev.moves-app.com/docs/api