Did you make working out a new year resolution? Apple assumed you did and wants to give you the "7 Minute Workout Challenge" app for free to get you started. The app is normally $1.99.
It is free, but not in the AppStore. If you search for it in the AppStore, it will still ahi up as $1.99.
You have to redeem the code inside the Apple Store and click on the "Jump into the New Year" link to redeem the code.
So if you are interested, download the Apple Store app and grab it before Feb 20 or so.