Apple Watch Series 5 40mmApple Watch Series 5 44mmApple Watch Series 4 40mmApple Watch Series 4 cellular 40mmApple Watch Series 3 cellular
Image
Dimensions
Screen resolution324x394368x448324x394324x394340x272
Always on displayYesYesNoNoNo
Features
Built-in memory32 GB32 GB16 GB16 GB16 GB
ProcessorApple S5 dual coreApple S5 dual coreApple S4 dual coreApple S4 dual core
Compatibility
Operating SystemwatchOS 6watchOS 6watchOS 5watchOS 5watchOS 4
Built-in microphoneYesYesYes
Sensors
Heart rate sensorYes Optical, ElectricalYes Optical, ElectricalYes Optical, ElectricalYes Optical, ElectricalYes
Connectivity
Battery
Battery life18 h18 h18 h18 h1 day
Design
Interchangeable strapsYesYesYesYesYes
Input methodDigital crown, Multi-Touch, Force Touch, Microphone, Siri, connected iPhoneDigital crown, Multi-Touch, Force Touch, Microphone, Siri, connected iPhoneDigital crown, Multi-Touch, Force Touch, Microphone, Siri, connected iPhoneDigital crown, Multi-Touch, Force Touch, Microphone, Siri, connected iPhone
Heart rhythm irregularity sensor EKG
Fall detector, contacts emergency services and gives them a recorded message of the location after a fall and one mins inactivity.
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