Fitness-tracking bands are indeed trendy right now, but how many of them can measure your altitude? If you’re gonna skip the elevator for the stairs at work, you damn sure want extra credit for that from your bracelet. The Fitbit Force ($TBA) is the successor to the Fitbit Flex, and the built-in altimeter is one of its key new features, letting you know just how many steps you conquered each day. It’ll also function as a watch, a key upgrade over the Fitbit Flex, and will feature a partially water-resistant body.