Lightroom Mobile: Swipe to flag pictures before importing into lightroom cc for ipad

Before importing lots of gigabytes of fotos into lightroom, i would like to be able to flag the pictures first so i can filter the pictures i dont want and delete them so i only import the pictures i actally need. There are of course third party apps out there for the job but those are more complicated to use.... to be able to swipe up and down to flag anpicture is genius. Please implement this thanks