This app is one of the examples of the "JavaScript Mobile Application Development" book which can be reached at:
http://www.amazon.com/JavaScript-Native-Mobile-Apps-Development/dp/1783554177/
https://www.packtpub.com/web-development/javascript-native-mobile-apps-development
This is a sample Apache Cordova project which utilizes Apache Cordova Media APIs in order to create a simple sound recording application on Windows Phone 8, Android and iOS.