Before I pull out of anywhere with other cars behind me, I sit with the engine idling and the vents still blowing warm, and I watch my own dot on the map until it twitches forward with the car. From the passenger seat it looks like superstition, and my friends tease me about it, but I picked the habit up from someone who learned it the hard way and I have never regretted the little bit of time it costs.
That someone is Theo, who drives with a loose crew out into the mountains a few times a year. On one of those trips he was sharing his location through Google Maps, and somewhere on a long climb the share stopped updating without telling anyone. The rest of the group kept rolling, sure he was right behind them because his avatar sat on a switchback a little way back, while the real Theo was somewhere else entirely with a phone that had quietly stopped talking to anybody. His rule since then is short: never trust a share you did not watch update with your own eyes.
Why the built-in option keeps letting people down
Google Maps has location sharing built in, so most people never look any further, and for a lot of everyday situations that is fine. If you want to think about what a constant stream of your position says about you before you choose anything, the privacy side of live tracking is worth reading first.
A Maps share was built to answer whether your friend has left the office yet. On the other end, someone has to open Maps, find your face floating on the map, wait for it to load, and work out on their own whether you are ahead of them or behind, with no shared destination and nothing that speaks up when one car wanders off from the rest. Picture doing that for a whole line of cars on a phone wedged into a cup holder while somebody in the back asks whether that was your exit.
The screen goes dark and the share goes with it
Once your phone slides into the door pocket and the screen goes black, the operating system can decide in the background that your sharing app is a battery drain it can live without. Nobody notices for a long stretch of highway, because a stale dot looks exactly like a live one until you stare at it long enough to see it is not moving. Android’s battery rules also shift between versions, so a setup that held up fine last summer can start dropping out after a system update on the very same phone. I have stopped pretending I can predict which way it will go, and most people only find out when someone in the group is already lost.
The apps that hold up run as what Android calls a foreground service, which sounds technical but really just means a small icon stays in your status bar and the phone treats the app as something you are actively using.
Konvoyage, the group app my friends and I ended up on, works this way. While you are in a trip there is a notification that reads “Sharing location with your group,” and your dot keeps moving on everyone else’s map with the screen off. I like catching that line when I pull the shade down at a red light, mostly because it is the only proof I get without asking someone.
You can test whatever you use before a real trip, and it takes less time than finding your sunglasses. Start the share with the screen locked and drive a loop around the neighborhood with the windows down while your passenger watches your dot on their phone. If it is still sitting at the curb where you started when you get back, the share died on the first corner and you would never have known. I run some version of that test before any drive with more than a single car now. It has headed off more than a few arguments in gas station parking lots that smelled like diesel and hot asphalt.
Theo goes further than I do, and before anyone leaves the lot he walks over to somebody else’s car to check his own dot crawling across their screen.
Your battery pays for all of it
Constant GPS and a steady trickle of uploads add up over a long day, and by mid-afternoon you can feel it in the heat of the phone against the vent mount. Apps built for driving in a group can be gentler about it, sending updates every few seconds while you move and backing off when you stop, though how much that saves depends a lot on the phone itself. Plug in before you get on the highway rather than once the battery icon turns red, and keep the cable somewhere your hand can find it without looking down.
If you are running a hotspot for the whole car, the data side stops being trivial too, mostly because of map tiles reloading rather than the location points themselves, which are tiny.
Watching a dot versus driving together
Passive sharing tells you where a person is right now, and everything else is guesswork done with your thumb on a map. A group navigation app starts from a different assumption: everyone is in the same trip headed to the same place, and nobody should have to touch a phone at highway speed to find out who is where. In Konvoyage that means everyone’s dot sits on one map alongside turn-by-turn directions, and if someone drops far enough back, the rest of the trip gets a notification that they are falling behind. It did not really land for me until a weekend when we tried to run a line of cars on Maps shares alone, and I spent most of a desert afternoon on speakerphone with the AC roaring, reading exit names to a friend who kept insisting he was on the right interstate when he was two exits past it.
Hiking groups have fought the same locked-screen problem on trails for years, and this piece on hiking-group tracking shows how it plays out once you leave the pavement.
When the person watching isn’t in a car at all
Sometimes the person who wants to know where you are is at home, waiting up with the porch light on and the TV turned low. For that, Konvoyage has a live view link. During a trip any member can tap the trip pill at the top of the map and choose “Share live view,” and if you are driving alone there is “Share my drive,” which asks for your name and an optional destination before handing you Android’s share sheet. Whoever gets the link opens it in a browser, with no app and no account, and sees your dot labelled with your first name along with a clock time for when you should arrive. They cannot message you through it or join anything, and the link stops on its own once the trip is over.
The last time I used it was a late drive home through the canyon after a friend’s birthday dinner, when I sent my mom a Share my drive link from the restaurant parking lot because she always asks me to text when I get in. Somewhere past the reservoir the road drops between rock walls and the radio fades into static, and her page put “no signal” next to my name instead of leaving her to puzzle over a dot sitting still on a bend. She sent a text that just said “canyon?” and nothing else. By the time I came out the other side the dot was moving again, and she never sent a second one. When I pulled into the driveway the link had already ended, since I had given it the address and it stopped when I arrived, and the porch light was on anyway.