Stylebook ($3.99) You can have your closet at your fingertips with this uber-useful app. Take pictures of your clothing, categorize items, and create outfits. Also, if youâ€™re an impulse shopper, this app will help you save money! By knowing exactly whatâ€™s already in your closet, you'll avoid making duplicate purchases. You wonâ€™t have any excuses for buying yet another classic black pump or blazer.