Apple has bundled a weather app with every iPhone and iPod touch ever sold, so creating a paid third-party alternative is either extremely foolish or very brave. To succeed, you’d have to stand out and offer something so different that paying for it actually makes sense. This is precisely what the creator of Partly Cloudy has done. Most weather apps offer a nice graphic of the current weather, along with basic information like temperature and other details. By contrast, Partly Cloudy is very spartan; there are no pretty pictures, just what looks like an unusual clock face.