This app detects when this device is being moved and recognizes sound when the alarm is armed - How does it work? If you move this device or speak very loudly into the microphone, the app will play a noisy sound and send push messages to your other registered device. - ...then what? The app instantly snaps a photo or records a video using your front camera. And saves it to the iCloud. - Useful for what exactly? Catch thieves in the act or let yourself know when your baby starts crying!