Fitbit Sense Graphite – Health-Focused Smartwatch with ECG & SpO2

The Fitbit Sense is a comprehensive health-focused smartwatch running Fitbit OS (proprietary) with support for iOS 12.2+ and Android 7.0+. It features an impressive sensor suite including multi-path optical HR, SpO2 (blood oxygen), ECG, skin temperature sensing, and stress tracking — rare hardware differentiators for mid-tier smartwatches. Built-in GPS + GLONASS enables accurate outdoor workout tracking; the 1.59-inch always-on display is bright and responsive. Water-resistant to 50m, it survives daily use and swimming. Battery lasts 6+ days on typical use, longer than Apple Watch but shorter than Garmin. Bluetooth calling and text replies add smartwatch conveniences; 7 days of minute-by-minute motion data supports detailed fitness analysis. Designed for health-conscious users who prioritize sensor variety and Fitbit's health ecosystem over raw processing power or third-party apps. International model includes 90-day Fitbit Premium trial.