Vigor turns the health data your watch or fitness tracker already records into a single body energy score from 0 to 100 - it charges when you rest and drains when you are stressed or active, so you can see at a glance whether to push hard or take it easy. Works with any tracker that writes to Apple Health. Inspired by the energy-reserve gauges on other fitness watches, but built independently on Apple Health and computed entirely on your iPhone. WHAT YOU GET A day chart showing your whole day