Do you always spend money on unripe watermelons? Just install the app and thumb the watermelon, and the magic will happen. The app uses complex algorithms that analyze the sound frequency of a watermelon, and detect the ripeness based on the sound.
InBackground simply enables you to "obviously" play any video in the web in the background. That includes but not limited to Youtube, Facebook, Dailymotion, Vimeo, and more.