Caffeineometer lets you track the amount of caffeine you consume throughout the day, and helps you stay in the buzz zone longer!

The app knows lots of different beverages, from simple brewed coffee to fancy espresso-based drinks as well as your favorite Starbucks.

With live tiles and notifications, the app keeps you updated on your caffeine levels throughout the day, and warns you when you're running low or are in danger of facing a sleepless night if you top up another cup.