Why You Want It: It’s a no-commitment way to try on hundreds of shades of nail lacquer from OPI, one of our most-loved beauty brands. Plus, you can find colors that perfectly coordinate with special outfits at home and have the polish name on hand when you hit the salon before a key meeting or a big night out. The app features an avatar hand that can be personalized by lightening or darkening the skin tone and adjusting the nail length to match your own, to get the most realistic view of how each polish hue will actually look. A favorites tool lets you access your picks quickly during mani-pedi appointments. Compatible with iPhone, iPod Touch and iPad.
Download it now: OPI by OPI Products Inc., free at itunes.com