Fitbit Charge 6 vs Fitbit Sense 2

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Charge 6 compared with Sense 2

	FitbitCharge 6	FitbitSense 2
Overview
Released
Released	October 2023	September 2022
Display
Case sizes
Case sizes	36.73 mm	40.5 mm
Panel
Panel	OLED	OLED
Always-on display
Always-on display	Yes	Yes
Display detail
Display detail	colour AMOLED touchscreen; always-on option	colour AMOLED touchscreen; always-on option
Screen protection
Screen protection	Corning Gorilla Glass 3	Corning Gorilla Glass 3
Health and fitness
ECG
ECG	Yes	Yes
Blood oxygen
Blood oxygen	Yes	Yes
Skin temperature
Skin temperature	Yes	Yes
Sleep apnoea alerts
Sleep apnoea alerts	No	No
High blood pressure alerts
High blood pressure alerts	No	No
Body composition
Body composition	No	No
Fall detection
Fall detection	No	No
Crash detection
Crash detection	No	No
GPS
GPS	Single-band	Single-band
Water resistance
Water resistance	50 m	50 m
Sensors
Sensors	Optical heart-rate sensor; electrical sensors for ECG; red and infrared SpO2 sensors; accelerometer; ambient light sensor; device temperature sensor for skin temperature variation; vibration motor	Multipath 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 features
Health features	ECG app and irregular heart rhythm notifications in supported regions; sleep tracking, SpO2, skin temperature variation, stress management and heart-rate alerts. Availability varies by country.	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 features
Fitness features	Built-in GPS and GLONASS; 40+ exercise modes; Active Zone Minutes; automatic exercise recognition; Google Maps directions and Google Wallet; YouTube Music controls require a compatible subscription.	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)
Battery life (maker's claim)	Up to 7 days	Up to 6 days
Mobile data option
Mobile data option	No	No
Works with
Works with	iPhone and Android	iPhone and Android
Battery life detail
Battery life detail	Up to 7 days; use of the always-on display and SpO2 features requires more frequent charging. A full 0–100% charge takes up to 2 hours.	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
Charging	Included charging cable; full 0–100% charge in about 2 hours.	Included charging cable; Google states a 12-minute charge provides a day of battery life; a full 0–100% charge takes about 2 hours.
Connectivity
Connectivity	Bluetooth; built-in GPS and GLONASS; NFC for Google Wallet. Compatible with Android 11 or newer and iOS 16.4 or newer through the Google Health app.	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
Storage	Saves 7 days of detailed motion data minute by minute and daily totals for 30 days; heart-rate data at 1-second intervals during exercise and 5-second intervals at other times.	Saves 7 days of detailed motion data minute by minute.
Design
Weight (lightest version)
Weight (lightest version)	30 g (better)	37.64 g
Software
Software	Other	Other
Case materials
Case materials	Aluminium case; flexible lightweight silicone band; Corning Gorilla Glass 3 display cover; water resistant to 5 ATM.	Flexible sport-watch-style band; aluminium watch case and buckle; Corning Gorilla Glass 3 display cover; water resistant to 5 ATM.
Size
Size	36.73 × 23.09 × 11.2 mm; 30 g including band.	40.5 × 40.5 × 11.2 mm; 37.64 g including band.
Bands
Bands	Small and large silicone bands included; small fits 130–170 mm wrists and large fits 170–210 mm.	Small and large classic flexible-material bands included; small fits 130–180 mm wrists and large fits 165–220 mm.
Colours
Colours	Coral/Champagne Gold; Porcelain/Silver; Obsidian/Black.	Shadow Grey/Graphite; Lunar White/Platinum; Blue Mist/Soft Gold.
In the box
In the box	Fitbit Charge 6 tracker; small and large bands; charging cable	Fitbit Sense 2; small and large classic bands; charging cable.