Jawbone today is launching an app that tries to tackle one of the biggest reasons we dont sleep — caffeine. Up Coffee is an app that lets you track how much caffeine you consume in coffee, soda, and other foods, and shows you how it will affect your sleep. Throughout the day, the amount of caffeine in the beaker will deteriorate in real time as it leaves your body — but log that extra cup of coffee you drank mid-afternoon, and it will spike again. Just using the amount of caffeine you take in, the app tells you how wired you are and when youre safe to go to sleep without the caffeine affecting you.