pedometer
device, usually portable and electronic or electromechanical, that counts each step a person takes by detecting the motion of the person's hands or hips
en-GB/pɛˈdɒmɪtə/
en-US/pəˈdɑmɪtɚ/
device, usually portable and electronic or electromechanical, that counts each step a person takes by detecting the motion of the person's hands or hips