Apple claims that the new wearables have the most accurate heart rate sensing in any wearable based on a study “on a diverse population of over 1,000 participants.”

The new Watches will also introduce “readiness” scores, which Apple says “analyze a user’s recent activity, training load, vitals, and sleep score to offer insight into their capacity for the day ahead” on a scale from 0 to 10. This score updates throughout the day based on the user’s activity.

Apple will update the iOS Health app later this year, allowing Watch Series 12 and Ultra 4 users to access a new “Health Age” score

“The Health app also includes movement evaluations that measure flexibility, strength, balance, and more using vision-based AI models on iPhone and heart rate data from Apple Watch. Users will be able to schedule and purchase new labs that feature over 50 key biomarkers for $119 directly through the Health app at approximately 2,000 Quest Diagnostics locations in the US,” Apple said.

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