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Personal Devices · Recorded milestone

Fitness tracker

Recorded year2009

Fitbit counts steps and sleep with a tiny accelerometer.

Explore this milestone on the interactive map

Built on

Stored-program computerRecorded · 1948requires
MicroprocessorRecorded · 1971requires
Wireless heart-rate monitorRecorded · 1982enables
Lithium-ion batteryRecorded · 1991requires
MEMS sensorsRecorded · 1993enables

Led to

Connected home fitnessRecorded · 2014enables
Over-the-counter glucose sensorRecorded · 2014enables
Smart ringRecorded · 2016enables
AI coaching from videoRecorded · 2018enables
Sleep-deepening headbandsRecorded · 2018enables
Light tuned to your body clockForecast · ~2036enables

Sources & evidence

Additional source

Dataset updated 2026-10-18. This individual record has not been separately re-reviewed.