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Fitbit Sense vs Fitbit Sense 2

Every spec side by side, from each maker's published figures.

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FitbitSenseFitbitSense 2
Overview
ReleasedSeptember 2020September 2022
Display
Case sizes40.48 mm40.5 mm
PanelOLEDOLED
Always-on displayYesYes
Display detail1.58-inch colour AMOLED touchscreen; 336 × 336 pixels; optional always-on displaycolour AMOLED touchscreen; always-on option
Screen protectionCorning Gorilla Glass 3Corning Gorilla Glass 3
Health and fitness
ECGYesYes
Blood oxygenYesYes
Skin temperatureYesYes
Sleep apnoea alertsNoNo
High blood pressure alertsNoNo
Body compositionNoNo
Fall detectionNoNo
Crash detectionNoNo
GPSSingle-bandSingle-band
Water resistance50 m50 m
Sensors3-axis accelerometer; gyroscope; altimeter; built-in GPS receiver with GLONASS; multipath optical heart-rate tracker; multipurpose electrical sensors for ECG and EDA Scan; on-wrist skin-temperature sensor; ambient light sensor; microphone; speaker; vibration motorMultipath optical heart-rate sensor; electrical sensors compatible with ECG and EDA apps; continuous electrodermal activity (cEDA) sensor; red and infrared SpO2 sensors; gyroscope; altimeter; 3-axis accelerometer; skin temperature sensor; ambient light sensor; NFC; vibration motor; speaker and microphone.
Health featuresECG app and irregular heart rhythm notifications in supported regions; EDA Scan for stress response; blood-oxygen and skin-temperature trends; sleep tracking and heart-rate alerts. Availability varies by region and some insights require Premium.ECG app and irregular rhythm notifications in supported regions; continuous electrodermal activity (cEDA) for body-response tracking, sleep tracking, SpO2 and skin temperature variation. Availability varies by country.
Fitness featuresBuilt-in GPS; 20+ on-device exercise modes; Active Zone Minutes; automatic activity tracking; workout intensity maps in the Fitbit app.Built-in GPS and GLONASS; 40+ exercise modes; Active Zone Minutes; connected Google Maps directions and Google Wallet. GPS use reduces battery life.
Battery and connections
Battery life (maker's claim)Up to 6 daysUp to 6 days
Mobile data optionNoNo
Works withiPhone and AndroidiPhone and Android
Battery life detail6+ days; a 12-minute charge provides up to one day of use. Continuous GPS and always-on display use reduce battery life.6+ days; use of the always-on display, SpO2 and cEDA sensor requires more frequent charging. Continuous GPS lasts up to 5 hours. A 12-minute fast charge is stated to provide a day of battery life; a full 0–100% charge takes about 2 hours.
Charging–Included charging cable; Google states a 12-minute charge provides a day of battery life; a full 0–100% charge takes about 2 hours.
ConnectivityBluetooth 5.0, Wi-Fi and NFC; built-in GPS and GLONASS; microphone and speaker support Bluetooth calls with a paired phone. Phone setup and sync use the Google Health app; current phone requirements are Android 11+ or iOS 16.4+.Bluetooth; built-in GPS and GLONASS; NFC; Wi-Fi is disabled. On-wrist Bluetooth calls require a paired phone nearby. Compatible with Android 11 or newer and iOS 16.4 or newer using the Google Health app.
Storage–Saves 7 days of detailed motion data minute by minute.
Design
Weight (lightest version)–37.64 g
SoftwareOtherOther
Case materialsAnodized aluminium housing with stainless-steel sensor ring; elastomer band.Flexible sport-watch-style band; aluminium watch case and buckle; Corning Gorilla Glass 3 display cover; water resistant to 5 ATM.
Size40.48 × 40.48 × 12.35 mm.40.5 × 40.5 × 11.2 mm; 37.64 g including band.
BandsSmall band fits 140–180 mm wrists; large band fits 180–220 mm wrists.Small and large classic flexible-material bands included; small fits 130–180 mm wrists and large fits 165–220 mm.
ColoursCarbon/Graphite; Lunar White/Soft Gold; Sage Grey/Silver.Shadow Grey/Graphite; Lunar White/Platinum; Blue Mist/Soft Gold.
In the box–Fitbit Sense 2; small and large classic bands; charging cable.

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