Series 11 and Ultra 3, the firm has indeed confirmed that Sleep Score will be launched as part of watchOS 26, and it will also be accessible on several older Apple Watch models, reaching back to the considerably older Apple Watch Series 6.
Overall, the company states that it will extend support for Sleep Score to the following currently supported older Apple Watch devices:
If your Apple Watch was not released in 2025 and is absent from this list, you will not have access to the Sleep Score feature.
If you happened to miss the introduction of Sleep Score at Apple’s “Awe Dropping” event, Sleep Score is an innovative feature that assesses numerous factors and then assigns a score out of 100 to your night of sleep data. This score aids you in identifying areas for improvement, as it examines not only how much time you spend in each sleep stage, but also your bedtime, wake-up time, the frequency of nighttime awakenings, and additional aspects.
Apple indicates that it will also analyze your heart rate, wrist temperature, respiratory rate, and even your blood oxygen saturation to
