Supported image formats are JPG, PNG, GIF, WebP (Android 4.0+), BMP, PDF, CBZ/ZIP,CBR/RAR,CB7/7Z,CBT/TAR,DJVU and ePUB. Files could be located on device or on network. Library with covers displayed to quickly open comics (multiple kind of views available) It's really simple to use. You just have to scroll ! Pages are automatically loaded and display (no need to click to go to next page). It's FREE and THERE ARE NO ADS.