Apple's Apple Watch has a number of health features that may not currently be on the radar, including the Vitals app for sleep, heart rate, wrist temperature, respiratory rate and sleep duration, which can reveal much more about your health than justifications. The Vitals App can provide a detailed picture of your health based on overnight health metrics such as heart rate and wrist temperature. It can also enable noise notifications to alert users when they're exposed to loud noises. The Noise app can measure sound levels in your environment and can alert users to potentially harm their hearing health over time. With the Apple Watch Series 8 or later and any Apple Watch Ultra model, Cycle Tracking can also be used to predict when ovulation occurs. The Watch app can also help women with ongoing cycle factors log their cycles and monitor their fertility.