Abstract: The present invention provides methods of and systems for predicting performance of a mobile application. A first mobile application is installed on a first plurality of wireless mobile devices. Operational data resulting from operating the first mobile application on the first plurality of mobile devices is collected. A second mobile application is installed on a second plurality of mobile devices. Test data resulting from operating the second the mobile application on the second plurality of mobile devices is collected. The performance of the second mobile application is predicted using the operational data and the test data for combinations of mobile device configuration and wireless network connection type not represented by the second plurality of mobile devices.