Jamo, an iOS-only exercise app, nails the Chromecast gaming experience, because instead of using the iPhone to control the action, all you do is hold the iPhone while you dance along to a video, beamed to your TV via Chromecast or Apple TV. (If you’re, say, traveling, you can even send the video over to your laptop’s browser, no Chromecast required.) As you copy the onscreen dancer’s moves, your iPhone detects your motion, and your score on the TV screen inches higher. You can compete head-to-head against a friend or stranger, or just play on your own and post your high scores to social media for your friends to beat.
The app is free, and there are a couple dozen free tracks to dance to, while others cost $1-$2 via in-app purchase. It’s really fun, and a lot cheaper than a motion-detecting game console.