Sense

Released September 2020

A health-focused smartwatch with ECG and EDA sensors, built-in GPS and multi-day battery life.

Type: Smart and sports
Sizes: 40.48 mm
Movement: –
Power reserve: –
Display: OLED
Battery: 6 days
Water: 50 m
GPS: Single-band
Weight: –

3 days+

What reviewers say

Reviewers value the broad health sensors, sleep tools and comfortable design, while noting that its smartwatch app ecosystem is limited. They also report occasional software and sleep-tracking problems that reduce confidence in the experience.

From techradar.com and wareable.com

Product links

Specifications

Report a wrong or missing spec

Display

Case sizes: 40.48 mm
Panel: OLED
Always-on display: Yes
Display detail: 1.58-inch colour AMOLED touchscreen; 336 × 336 pixels; optional always-on display
Screen protection: Corning Gorilla Glass 3

Health and fitness

ECG: Yes
Blood oxygen: Yes
Skin temperature: Yes
Sleep apnoea alerts: No
High blood pressure alerts: No
Body composition: No
Fall detection: No
Crash detection: No
GPS: Single-band
Water resistance: 50 m
Sensors: 3-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 motor
Health features: ECG 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.
Fitness features: Built-in GPS; 20+ on-device exercise modes; Active Zone Minutes; automatic activity tracking; workout intensity maps in the Fitbit app.

Battery and connections

Battery life (maker's claim): Up to 6 days
Mobile data option: No
Works with: iPhone and Android
Battery life detail: 6+ days; a 12-minute charge provides up to one day of use. Continuous GPS and always-on display use reduce battery life.
Connectivity: Bluetooth 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+.

Design

Software: Other
Case materials: Anodized aluminium housing with stainless-steel sensor ring; elastomer band.
Size: 40.48 × 40.48 × 12.35 mm.
Bands: Small band fits 140–180 mm wrists; large band fits 180–220 mm wrists.
Colours: Carbon/Graphite; Lunar White/Soft Gold; Sage Grey/Silver.

Pros and cons

Pros

ECG, electrodermal activity and skin-temperature sensing
Built-in GPS, sleep tracking and broad health metrics
Up to six days of claimed battery life

Cons

Many detailed health insights require Fitbit Premium
Third-party app selection is limited compared with larger smartwatch platforms
Reviewers reported software and sleep-tracking inconsistencies

Closest rivals

Model	Type	Sizes	Movement	Power reserve	Display	Battery	Water	GPS	Weight	Released
FitbitVersa 3	Smart and sports	40.48 mm	–	–	OLED	6 days	50 m	Single-band	–	Sept 2020
FitbitSense 2	Smart and sports	40.5 mm	–	–	OLED	6 days	50 m	Single-band	37.64 g	Sept 2022
FitbitVersa 4	Smart and sports	40.5 mm	–	–	OLED	6 days	50 m	Single-band	37.64 g	Sept 2022

Newer model: Sense 2.

Sources

Photo: Fitbit/Google supplied product photograph; complete supplied canvas, background and transparency preserved.

Fitbit Sense in a light-coloured band showing oxygen saturation on its display.: Fitbit/Google supplied product photograph; complete supplied canvas, background and transparency preserved.

Spot a mistake? Tell us