Backgrounds can be enabled/disabled in settings.
A Spartan's HUD over the Halo rings.
• Shield bar for the battery, red and flashing when low
• Health segments and a ring around the edge for your step goal
• An ammo counter that fires a round every second
• A motion tracker that pulses, with contacts flaring as it sweeps
• Steps and heart rate
• Two views of the rings, changing every 15 minutes
• A quiet always-on clock that protects your screen