I have a great opinion of the app, I like that the features include them being seen "on the move" and how fast they are going approximately but my boyfriend has a tablet with service which shouldn't have any issues tracking because we have the location setting to ALWAYS ALLOW yet its always showing "off the grid" and only even updates when he OPENS the entire app!!! So there's some glitch and major flaws there. I can't rely on it now since this issue but with a cell phone it never will fail you