activitytracker

noun
UK /ækˈtɪvəti ˌtrækə/
US /ækˈtɪvəti ˌtrækər/

A small tool or app that counts how much you move and exercise.

My activitytracker says I walked ten thousand steps today.


OTHER MEANINGS

2. A device worn on the wrist that records exercise and heart rate.

She wears an activitytracker to see how well she sleeps.

3. A phone app that logs your daily movement and workouts.

The activitytracker on his phone reminds him to stand up every hour.

4. A person or system that keeps a record of events or actions.

The teacher is the activitytracker for the school's field day.