I haven't charged my Fitbit Ultra in over three weeks. And I doubt I ever will again.
Ever since I bought an iPhone 5S, I've kept an eye on how the embedded M7 motion coprocessor chip, which can track and store motion information, would be used. It wasn't clear when the iPhone 5S was launched exactly how the M7's data would be available, but after a few months, fitness apps like the Nike+ Move have started adding support for basic step-counting functionality.
While I started tracking my steps with both my Fitbit and Nike's app … Read more