Microsoft has just released a life logger app titled Time of My Life into the Windows Phone Store. The app basically tracks where you spend your time most, and based on your GPS coordinates and known locations it will tell you how much time you're spending at your favorite restaurant or coffee shop, lounging at home, or hard at work.
After about a week of learning your behavior, the app will begin generating graphs about where you spend most of your time. Ultimately, the goal is to help you manage and budget your time better and be more productive.
The app is available right now as a free download and you can grab it here in the Windows Phone Store
Thanks, ven07, for the tip!