RunKeeper is one of the most popular run-tracking apps for the iPhone, and on Thursday it's launching a new app called Breeze to take count of how much you're walking around, too. The app works only on the iPhone 5S and is based around its M7 motion processor, which is always collecting your steps in the background. Using that, it's able to display exactly how far you've walked that day as soon as you open it up. While there's no shortage of pedometer apps for the iPhone 5S, Breeze stands out by keeping its interface simple, giving you a personalized walking goal to reach every day and telling you exactly how close you should be to it during any given hour. There's a lot more that the app can tell you too — including your walking history and where you went during some long walks — but that information is largely tucked away inside the stat pages for individual days in the past.