The Viper SmartStart app is available for free from the App Store, Android Market and BlackBerry App World. Those who have already installed the app need to update to version 2.2 to get the home alarm features. And there is one last thing. You must have an Alarm.com enabled home security system for the app to work.
The company behind the application has also just launched Viper SmartStart GPS which not only lets you control, track and locate a car using your smartphone, it also adds social networking and other safety functions.