Dynamic filtering in application search

One embodiment of a disclosed system, method, and computer readable storage medium provides dynamic filtering in application searches. Partner systems leverage search functionality of an application search system configured to perform searches for applications. In one embodiment, partner systems select application categories to be associated with search queries submitted to the application search system via the partners' websites. When users submit search queries to the application search system via a partner system, the users' queries are associated with the partner system's application category selection. Alternatively, the search queries may implicitly or explicitly specify an application category. In response to receiving the queries, the application search system returns search results from the selected application category.