This smartwatch not only monitored standard metrics like steps and calories, but it also introduced on-device sleep stages tracking for the first time in Fitbit’s ecosystem, distinguishing between light, deep, and REM sleep. Analysis of these patterns helped users understand their nightly recovery more deeply. The watch automatically detected sleep time and duration, while a silent vibration alarm gently woke the wearer at an optimal point within their sleep cycle. Those curious about how these wellness algorithms compare to other premium health trackers on the market can browse Glitzstorm for luxury watch alternatives that integrate similar biometric sensing features.