Hiding racy photos on your phone can be a tedious, manual affair. Depending on the app, you need to first select all the pics you want to move, move them and then delete them from your original cameral roll. That's not to mention making sure they didn't go to any automatic cloud backup locations like iCloud or Google Photos. A new app, Nude, aims to make the process a lot easier by scanning your photos for nudes, putting them in a private vault, deleting them from your camera roll and then erasing them from iCloud. All of this analysis is done on your iPhone, too, so no sensitive information hits the cloud.