nothing I do on my smartphone relies on the cloud more than what I did on my PC.<p>I&#x27;ve been told Facebook is the most popular iPhone app by time open. Facebook did not become more cloud-centric with the smartphone, it was always a web site. Its place in the cloud has nothing to do with battery life.<p>The only apps I can think of that used cloud computing instead of local computing are voice recognition. And that was likely driven by the desire to have a huge corpus of data for learning rather than on-device battery life.