Another on the products page: "Our mobile phone garage door opener will even send you a text message you if you forgot to close the door!".
Instructions are pretty simple - there's a contact switch that puts the os in setup mode and creates an ad hoc network for the app to configure the wifi with your network. It gets linked up with your account and then you wire it up to your garage door button wires (usually 2 thumb screws on the door unit). After that mount the magnetic sensor.