What will the Vibration setting do? September 17, 2019 15:30 Updated Hal will alert you when important things happen during your run by using your phones vibration function. Related articles What will the Music setting do? How can I delete the run I just tracked with the GPS tracker? How do I save my run? Why is my current pace, distance, or duration inaccurate? Does Run With Hal have audio cues while using the GPS tracker?