It appears that scientists have finally found some practical use for all those unused smart phone fitness apps. They can track worldwide activity levels.
They managed to get permission to anonymously track 700,000 users of the Argos activity app's built-in accelerometer.
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| Fitness Apps Promise Much But Are Usually Unused After A Month |
They managed to get permission to anonymously track 700,000 users of the Argos activity app's built-in accelerometer.
