SaleSorter There are so many great deals online, but sometimes it's best to try things on. (Warning. That size zero isn't the same everywhere). Use the Foursquare-powered SaleSorter, to find which brick-and-mortar stores are offering the best buys. This app tells me things are 50% off at the nearest Lane Bryant. If they're not a good fit for you, there's 60% off at The Gap ( GPS) around the corner. If you're too busy to make it there today, check the "notify" box on your favorite stores. SaleSorter will tell you when they're offering discounts again. Use technology to help you shop the old way. The free app is compatible with iPhone, iPod touch, and iPad, but requires iOS 5.1 or later.