CC-Viewer is an offline browser for Comiket's web catalog. It requires a separate Gold account to use. It is compatible with Android 4 and later, as well as ARM CPUs. It can also handle data obtained from other events. The app is straightforward and designed with emphasis on compatibility and speed. It also allows customization of the display and buttons, as well as checklists. However, it is important to note that some local file and folder operations may not be possible with the latest versions of Android. Furthermore, the app requires an active Gold account to access Comiket's web catalog data. Users should also take note that the app does not close completely with a double back key press.