Google Now is an intelligent personal assistant developed by Google. Google Now, including Now cards, voice search and commands, is available in the Google app for Android and iOS. Now cards are also available for Chrome OS in the notification center. Voice search and limited voice-commands are available in the Google app for Microsoft Windows, and through Google Search when using the Google Chrome web-browser. Google Now uses a natural language user interface to answer questions, make recommendations, and perform actions by delegating requests to a set of web services. Along with answering user-initiated queries, Google Now pro-actively delivers to users information that it predicts (based on their search habits) they may want. It was first included in Android 4.1 ("Jelly Bean").