The app is very reliable if the users you are tracking have internet access. If they have internet access, the phone can send latitude longitude updates to us and we can pinpoint it’s location. But if for any reason, the app does not have internet access, all location update will stop until such time as internet access is restored. Also, please know that sometimes if you cannot see someone or don’t see a location update, the app is probably operating as it should be it’s just that the user you are tracking may have turned Broadcast location OFF or they could have gone invisible to you. Users also always have the right to stop anyone from tracking them at any time.