Mixel
There are tons of great cocktail apps. Problem is, most of us don't have access to a bar full of ingredients at home, meaning many of the recipes are useless. Mixel lets you add the ingredients you own to your in-app bar, then shows you drinks you can make using the stuff you already have. It offers over 700 curated recipes in all, a database of over 500 ingredients, and the ability to add your own recipes to your list of favorites.