New Year's resolutions, health goals, and normal fitness trackers not enough to get you up and active? Use shame as your motivation by downloading Cakewalk. This humorous app uses the sensors in your iPhone to track your movement, and sends you a message each morning telling you how much you moved — or how little — the day before. Built-in challenges and a friend-based leaderboard give you added incentives, an Apple Watch app lets you keep track of your progress on your wrist, and if all that isn't enough, you can set the app up to publicly shame you on social media. It's fitness tracking for the lazy.