Had some trouble getting the sensors to pair accurately with my phone. I have a reverse trike; So it took some time to figure out which was which. The readings seem accurate, but I'm not getting any alerts from the app when the pressure drops. I tested by removing one of the sensors, which resets it. The application showed zero, but there was no alarm. This is great for checking pressure manually, but as far as automatic pressure checking while riding, it doesn't work.