&gt;Moreover, as AnandTech points out, with the extra power and programmability on offer, in-ear headphones could also be used to track health data like temperature, which can in turn feed into the growing array of fitness-tracking databases.<p>I&#x27;m glad that they&#x27;re just straight up admitting that the reason that they&#x27;re doing this is snooping.  That&#x27;s quite refreshing.