Apple probably has to work on improving the accuracy of activity monitoring on its devices. This paper from ACM Ubicomp 2013 concludes (as of ~2012), that iPho

Apple probably has to work on improving the accuracy of activity monitoring on its devices. This paper from ACM Ubicomp 2013 concludes (as of ~2012), that iPhone (Moves App)performed worse than Nike+Fuelband, Nike+Sportsband, and Fitbit in tracking step-recording, with Fitbit performing the best. https://www-old.comp.nus.edu.sg/~brown/pdf/pdm_workshop2013.pdf https://www-old.comp.nus.edu.sg/~brown/pdf/pdm_workshop2013....