How does sleep tracking work?

Why are people so interested in sleep tracking?

What devices offer sleep tracking?

Fitbit 

  • Fitbit Inspire HR Fitbit Inspire 2 Fitbit Luxe Fitbit Charge 3 Fitbit Charge 4 Fitbit Charge 5 Fitbit Versa Fitbit Versa 2 Fitbit Versa 3 Fitbit Versa Lite Fitbit Sense Fitbit Ionic

Google

  • Nest Hub (second generation)

Apple

  • Apple Watch Series 3 Apple Watch Series 4 Apple Watch Series 5 Apple Watch Series 6 Apple Watch Series 7 Apple Watch SE

Withings

  • Withings Sleep Analyzer Withings Move ECG Withings Steel HR Withings Scan Watch Withings Pulse HR

Polar

  • Polar Vantage V Titan Polar Vantage V Polar Vantage M Polar Vantage M2 Polar Grit X Polar Ignite Polar Ignite 2 Polar Unite

Garmin

  • Garmin Lily Garmin Enduro Garmin Approach S62 Garmin Fenix 6 series Garmin Fenix 7 series Garmin Forerunner 245 / 245 Music Garmin Forerunner 45 / 45S Garmin Forerunner 55 Garmin Forerunner 945 Garmin Swim 2 Garmin Instinct Garmin Instinct Tactical Garmin Instinct Solar Garmin Legacy Hero and Saga series Garmin MARQ series Garmin Quatix 6 Garmin Tactix Delta Garmin Venu Garmin Venu 2 / 2S / 2 Plus Garmin Venu Sq Garmin Vivoactive 4 / 4S Garmin Vivosmart 4 Garmin Vivomove 3 / 3S Garmin Vivomove Luxe Garmin Vivomove Style Garmin Epix

Samsung

  • Galaxy Watch 4 Galaxy Watch 4 Classic Galaxy Watch 3 Galaxy Watch Active 2 Galaxy Watch Active Galaxy Watch Galaxy Fit Galaxy Fit e Gear Fit 2 Pro