Screen showing my HU installed with the TPMS app running. Note that the TPMS runs in the background and will alert you if there's a problem with your tires. The software allows you to set the pressure and temperature warnings and whether you get just a warning bar on the screen, or whether you also get a warning chime. The latter will get your attention, but keeps chiming until turned off (which would be very annoying if you didn't know to do that).