Big, clear speed the second you open it. This HUD speedometer shows your live GPS speed in mph, km/h or knots, keeps a trip meter running when you want one, and lets you set your own speed alert for each vehicle. The number is already on screen when the app opens. You don't need to start a trip, make an account or dig through menus first. Why drivers and riders keep it HUD mode for night driving Switch on HUD mode and your speed fills the screen, mirrored.