ShakeAlertLA is described as 'sends alerts to users within Los Angeles County that an earthquake of greater than magnitude 5.0 or level IV intensity has been detected and that they may soon feel shaking. The app is available for both Apple and Android devices and available in both English and' and is a weather forecast tool in the online services category. There are four alternatives to ShakeAlertLA for iPhone, iPad, Linux, Mac and Windows. The best alternative is QuakeFeed, which is free. Other great apps like ShakeAlertLA are JQuake, My Earthquake Alerts & Feed and MyLA311.