Systems and techniques are disclosed for providing a standard version of an application to a first user, receiving a request for the application from a second user, identifying the second user as a test user, and providing a second version of the application to the second user based on the identification. Interaction events with the second version of the application, by the second user, may be reported and used by the arrangement to modify the second version of the application. Alternatively, a second user may reject the second version of the application and the second user's status may be modified based on the rejection.