The original Wii fit sold over 22.67 million copies and Wii Fit Plus sold 20.86 million copies, so it comes as a bit of a shock that Nintendo will give Wii Fit U for free on November 1 as a digital download. There are a few catches, of course.
First, you'll need to already own the Wii Fit Balance Board peripheral. You'll also have to have an Internet connection (to download it). Finally, you can download and use it for a month, but after that you'll have to purchase a $20 Fit Meter and sync it with the game to keep the full version. The full Wii Fit U software will be downloadable from the Nintendo eShop between November 1, 2013 and January 31, 2014.
Of course, if all of that is just too complicated for you, you can simply buy the game packaged with the Fit Meter when it releases for $50 on December 13. You could also buy the $90 bundle that features the game, the Fit Meter and the balance board. A "full-priced" digital version will also launch on February 1, 2014. The Fit Meter accessory is described as an "activity meter" that records steps taken, intensity of steps, and altitude. The data collected from the device is used to calculate calories burned and can be transferred wirelessly to Wii Fit U using the GamePad.