Nike+ Fuelband vs. FitBit Ultra vs. Striiv | Mobile Health: How Mobile Phones Support Health Care |

Yesterday morning, I tooled up myself with 3 of my lovely desirable sensors.

In the afternoon, I was troubled as the 3 sensors displayed different measures for steps as for calories burned (where the delta is very important). Which sensor do you think we could believe the most ?

Via Olivier Janin