The retro-chic fitness-tracking Nike+ FuelBand looks like an understated gadget, and in fact, it is. The data it collects is very limited, making it little more than a glorified pedometer.

[Simone] was trying to reverse-engineer the Bluetooth protocol of his Nike+ Fuelband and made some surprising discoveries. [Simone] found that the authentication system of the Fuelband can be ...

Sure, there are the exclusive Nike watch bands, the watch faces with Nike fonts and the pre-installed Nike+ Running app. But really, this is just an Apple Watch Series 2 with a few bits added.

Correspondence to Dr Manolis Adamakis, Faculty of Physical Education and Sport Science, National and Kapodistrian University of Athens, Athens 17237, Greece ...