The intimate-apparel app, which is available for free in the App Store, functions as a virtual tape measure to calculate a woman's exact size. Once fitted, you can shop a collection of gorgeous undergarments tailored to your measurements. You'll also only encounter models that look similar to your size, so the experience is seamlessly customized to you. And, with Valentine's Day around the corner, it's only fitting that the app just rolled out a fresh collection of pretty underthings for the holiday. Who knew bra shopping could be this satisfying?