Fitbit Ace 3
Quick details
Released
March 2021
Dimensions
37.33 x 16.76 x 12.7 mm (L x W x H). Fits wrist 122 mm-173 mm in circumference
Operating system
Proprietary
Display 0.72 inch PMOLED touchscreen
Battery life Up to 8 days
Water resistance 5 ATM
GPS No
Sensors 3-axis accelerometer; heart-rate sensor present but disabled
Technical specifications
General
Release date 2021-03-15
Product type Kids fitness tracker
Physical size 37.33 x 16.76 x 12.7 mm (L x W x H). Fits wrist 122 mm-173 mm in circumference
Weight 19.3 g
Material Plastic housing; silicone band with plastic buckle
Water resistance 5 ATM
Color options Cosmic Blue / Astro Green; Black / Sport Red
Display type PMOLED touchscreen
Display size 0.72 inches
Display resolution 72 x 128 pixels
Display brightness Peak brightness not published
Display protection Cover glass; exact type not published
Battery Rechargeable lithium-polymer battery
Battery life Up to 8 days
Charging USB charging cable
Charging time About 1-2 hours
Sensors
GNSS type None
GPS No
GALILEO No
GLONASS No
QZSS No
Beidou No
Accelerometer Yes
Gyroscope No
Barometric altimeter No
Compass No
Geomagnetic No
Ambient light sensor No
Optical heart rate No (sensor present but disabled)
Electrical heart rate No
SpO2 No
Temperature No
Galvanic skin response No
Microphone No
Speakers No
Vibration motor Yes
Health & activity tracking
Steps Yes
Distance No
Calories burned No
Floors No
Sports tracking Active Minutes
Sleep Yes
Heart rate No
HRV No
Stress No
Blood oxygen No
Respiration rate No
Skin temperature No
ECG No
Blood pressure No
Body composition No
Glucose No
Hydration level No
UV exposure No
Calorie intake No
Daily Readiness No
Cardio Load No
Target Load No
Hyperglycemia risk assessment No
Arterial stiffness detection No
Pulse wave arrhythmia analysis No
Daily smart features
Smartphone compatibility Fitbit app on compatible Android/iOS phones; child account required
Operating system at launch Proprietary
Data retention 7 days detailed data; 30 days daily totals
Bluetooth Yes (4.2)
Wi-Fi No
NFC / connected pay No
UWB No
Cellular No
Smartphone notifications Yes (call notifications)
Bluetooth calling No
Smartphone music control No
On-board music storage No
Voice assistant No
Links
These technical specs are correct to the best of our knowledge at the time of publishing.
