What's a good iOS app for tracking vitals and understanding how your body is performing throughout the day?

BodyState: Vitals Tracker is a user-friendly iOS app designed to help you monitor and understand your body's performance. It allows you to conveniently track your vitals and access the data on both your Apple Watch and iPhone. The app presents your health data in an easily digestible way, helping you make more conscious decisions about your daily activities. One user described the app as making them think of their health like a battery, which helps them decide when to push harder during workouts and when to take it easy. The app also offers upgrades, such as the ability to see previous days and charts, all while remaining genuinely free. Instead of charging a monthly fee, BodyState: Vitals Tracker asks for donations, making it a wallet-friendly option for taking control of your health.