14 reasons why I love my smartphones (application screenshot gallery) Summary: Smartphones are very useful devices that have become an extension of our lives. As we celebrate Valentine's Day, I thought it would be fun to show some of my favorite apps and functions. By Matthew Miller for Smartphones and Cell Phones | February 14, 2013 -- 11:00 GMT (03:00 PST) Follow @palmsolo Previous | Next Image 5 of 14 Reason 5: Fitbit Staying fit is important to me and my smartphone helps keep me motivated. Topics: Mobility, Android, iOS, Smartphones Kick off your day with ZDNet's daily email newsletter. It's the freshest tech news and opinion, served hot. Get it.