Polar Loop vs Fitbit Charge 4 comparison

Compare Polar Loop
Compare Fitbit Charge 4
key specs
Water ResistantYesYes
Heart Rate MonitorYesYes
Compatible Devices-iOS and Android
Battery Life (Days)-7
general
BrandPolarFitbit
ModelLoopCharge 4
Release dateDecember 5, 2025March 31, 2020
Model NamePolar Loop-
MaterialStainless Steel-
Suitable ForUnisexSports, Fitness
Water ResistantYesYes
Reading Type-Digital
Ideal For-Unisex
display and battery features
Battery TypeLithium Polymer (Li-poly)Lithium Polymer (Li-poly)
Charge Time (hours)8-
Battery Capacity (mAh)170-
Battery Life (Days)-7
performance features
Water-Resistant Depth (metres)3050
Operating Temperature (Celsius)-20 °C - 50 °C-
activity tracking function
Blood Pressure MonitorYes-
Calories BurnedYes-
Distance CoveredYes-
Heart Rate MonitorYesYes
Sleep TrackingYes-
SPO2 MonitorYes-
Step CounterYesYes
workout modes
TreadmillYes-
ExerciseYes-
Outdoor RunningYes-
CyclingYes-
WalkingYes-
sensors
Electrical Heart Rate SensorYes-
GyroscopeYes-
Optical Heart Rate SensorYesYes
PedometerYes-
Vibration MotorYesYes
Accelerometer-Yes
Barometric Altimeter-Yes
dimensions
Weight (grams)29-
Width (mm)2722.7
Height (mm)4235.8
Depth (mm)912.5
connectivity features
Bluetooth Enabled-Yes
Bluetooth Version-v4
compatibility
Compatible Devices-iOS and Android

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