An application executing on a mobile device, such as an application associated with a social networking system provides a link to install a third-party application. The link may be presented in an advertisement, and the link is used to retrieve data comprising a client application for execution by the mobile device. To track installations, the client application stores an indication that the client application was installed in a shared memory location on the mobile device, as native applications do not have access to cookies. A social networking application executing on the mobile device retrieves the indication the client application was installed from the shared memory location and communicates it to a social networking system for storing in a user profile.