New app pits your caffeine habit against your insomnia

If you sip a lot of coffee, tea or soda throughout the day, Jawbone has an app for you. Up Coffee, hitting Apple's iOS App Store Thursday, is a free app that will estimate how much your caffeine intake impacts your sleep.

The app works fairly simply—first, you enter in your age, weight and height. After that, you can use the app to log every cup of joe or any other caffeinated beverage you drink. Up Coffee will crunch the numbers and come up with a projected sleep time. Up Coffee’s estimates—which are based on data it’s collected from users of its Up and Up24 fitness bands—show up on a graph that ranges from “wired” to “sleep ready.”

As you enter your own sleep times every morning, the app will wise up to your habits, Jawbone said. After logging caffeine intake and sleep times for 10 days, Up Coffee will show how much sleep you lose for every 100mg of caffeine you drink.

Click here for the full report from The Wall Street Journal.

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