Coca-Cola have created an app to go with their TV commercial in Hong Kong. The branded app Chok turns mobile devices in a Wii-like remote control that the user shakes when a Coke commercial comes on the screen. The app takes the audio signal from the commercial and syncs it to the phone. When the app instantly recognizes that both a commercial is on air, and the device has been shook, the user collects a digital bottle cap. As participants collect bottle caps, the most competitive are entered into a sweepstakes.