1. A computer-implemented method comprising: displaying, on a touchscreen of a user device, a first browse wheel having a circular shape and comprising a plurality of category regions within the circular shape, each category region associated with an application category and having a visual representation of the associated application category; receiving a user selection of an application category, the user selection of the application category comprising a touchscreen interaction with the first browse wheel; displaying, in response to the received user selection, a second browse wheel having a circular shape and comprising a plurality of subcategory regions within the circular shape, each subcategory region associated with an application subcategory of the selected application category and including a visual representation of the associated application subcategory; receiving a user selection of an application subcategory, the user selection of the application subcategory comprising a touchscreen interaction with the second browse wheel; and generating, in response to the received user selection of the application subcategory, an application search query using the selected application category and the selected application subcategory.