@nate They're probably monitoring significant location changes for major airports, specifically for this use case. (Caveat: You're limited to 64 locations, so I have to imagine they picked the most common airports, or have some personal heuristics based on where you've taken Lyfts to/from.)

@mergesort wait you can use the significant location changes api without background location permission?

@nate You know I thought it was possible, but I'm not 100% sure anymore. I think I remember enabling the location background mode was enough to opt you into Significant Location Changes with a few caveats (like the app couldn't have been force quit). But I'm honestly not as sure about that as I was, it's been a while since I've used those APIs.