Assertion: operating system's application | /r/HasProperty | app
Facets:
Source sentences:
text: Applications ("apps"), which extend the functionality of devices, are written using the Android software development kit (SDK) and, often, the Java programming language.
text: As of May 2013 , 48 billion applications ("apps") have been installed from the Google Play store, and by September 2013, one billion Android devices have been activated.