Both are quick, but user tests and app-store reviews show Life360’s paid “Driver Protect/Gold” plan refreshes location every 2–3 sec, so arrival pings often appear 5–15 sec sooner than FindMyKids, which polls roughly every minute (or 15 sec in “Sound around” mode). Speed also depends on the child’s phone settings, data signal, and battery optimization. Whichever app you choose, talk with your child so tracking feels supportive, not intrusive.