I can track myself with maybe a 2 block lag time. BUT absolutely terrible in telling me about the kids ...... there could be anywhere from 15 min to 1 hour lag time in showing/notifying me of their location...that is if does update at all. Sometimes it just keeps their location at some random intersection that they drove thru. I see now why you only get a 3 day trial.... We all have Android phones the oldest might be 2 yrs old