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  2. Stepped reckoner - Wikipedia

    en.wikipedia.org/wiki/Stepped_reckoner

    The stepped reckoner or Leibniz calculator was a mechanical calculator invented by the German mathematician Gottfried Wilhelm Leibniz (started in 1673, when he presented a wooden model to the Royal Society of London [2] and completed in 1694). [1]

  3. Pedometer - Wikipedia

    en.wikipedia.org/wiki/Pedometer

    A digital Omron HJ-112 pedometer Mechanical pedometer. A pedometer, or step-counter, is a 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.

  4. 10,000 Steps Is A Myth. Here's What Science Says You Should ...

    www.aol.com/10-000-steps-myth-heres-110000541.html

    The real story behind the 10,000 step number is a little wilder and less science-forward than you might think. In this feature, Women's Health investigates. ... The Proof Is In The Pedometer. It ...

  5. Fitness tracker - Wikipedia

    en.wikipedia.org/wiki/Fitness_tracker

    Fitness trackers are a more sophisticated version of the pedometer; in addition to counting steps, they contain additional sensors such as accelerometers and altimeters to collect or estimate measures including the speed and distance travelled, heart rate, calorie expenditure, or the duration and quality of sleep. [2]

  6. Leibniz wheel - Wikipedia

    en.wikipedia.org/wiki/Leibniz_wheel

    In the position shown, the counting wheel meshes with three of the nine teeth of the Leibniz wheel. A Leibniz wheel or stepped drum is a cylinder with a set of teeth of incremental lengths which, when coupled to a counting wheel, can be used in the calculating engine of a class of mechanical calculators.

  7. Fitbit - Wikipedia

    en.wikipedia.org/wiki/Fitbit

    Fitbit devices that are worn on the hip accurately measured steps taken within 1 step of 100% accuracy. Devices were worn on the wrist, however, were off by an average of 11 steps per minute. When measuring the number of calories burned, Fitbit devices worn on the hip underestimated by an average of 6%, while devices worn on the wrist ...

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