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Price$ 429$ 279$ 399$ 230$ 350$ 250$ 255
Dimensions
Screen size41 mm1.4 in round1.6 in1.39 in round
Screen resolution368x448324x394360x360360x 360400x400320x320400x400
Case thickness10.74 mm10.74 mm11.3 mm10.9 mm11.3 mm10 mm9.95 mm
Case Diameter42.5 mm40 mm42 mm50.8 mm49.5 mm
Weight48.2 g37 g4.64 oz45 g59.54 g
Features
Built-in memory32 GB32 GB8 GB4 GB4 GB4 GB4 GB
RAM1 GB1.5 GB512 MB512 MB512 mb
ProcessorApple S6Apple S5Exynos 9110 (dual core, 1.15 GHz)Exynos 9110 (dual core, 1.15 GHz)1.2 GHz Snapdragon 4001.2 Ghz, Quad ARM A7Qualcomm® Snapdragon Wear 2100
CompatibilityAndroid 4.3+ / iOS 8.2+> Android 4.3Android 4.3+
Operating SystemwatchOS 7watchOS 7TizenTizenAndroid WearAndroid Wear
Front cameraNoNoNoNoNoNo
Built-in speakerYesYesYesYesNoYesYes
Built-in microphoneYesYesYesYesYesYesYes
WaterproofYes 5 ATMYes 5 ATMYes 5 ATM, IP68Yes 5 ATM, IP68NoYes IP68
Sensors
Heart rate sensorYes Heart rate, blood oxygen, ECGYesYes Heart rate, blood oxygenYes Heart rate, blood oxygenYes PPGNoNo
PedometerYesYesNoYes
Skin Temperature
Connectivity
Bluetooth®Yes 5.0Yes 5.0Yes 5.0Yes 5.0Yes 4.1 BLEYes 4.0Yes 4.0+
Bluetooth Headphone ConnectionNoYes- Mixed reports
Wi-FiYes 802.11b/g/n dual bandYes 802.11b/g/nYes 802.11b/g/nYes 802.11b/g/nYesYesYes
3GNoNoNoNo
4G LTE--NoNoNoNo
GPSYesYesYesNoYesNo
NFCYesYesYesYesNoYes- Mixed reports
Infrared portNoNoNoNo
Phone capabilityNoNo
Battery
Wireless chargingYesYesYesYesNo
Charge typeProprietary USB CablemicoUSBProprietary USB Cable
Battery capacity247 mAh247 mAh300 mAh420 mAh340 mAh
Battery life18 h18 h48 h60 h1.5 days2 days up to1.5 days
Design
Interchangeable strapsYesYesYesYesYesYes PropietaryYes
Watch Case OptionsStainless, Black, Rose Gold-Gunmetal, Silver, Rose Gold
Release dateSep. 15th 2020 Sep. 15th 2020 Sep. 17th 2015 Sep. 5th 2014