PR NEWSWIRE - Feb 27 - European dating app, Once, is launching in the US. Once has a rating system, similar to Uber, that allows women review their conversation, dates and profile picture accuracy of the men they went on dates with. These ratings are then available to other Once users. Launched in October 2015, Once is a slow dating app that focuses on quality over quantity by picking the best matches for users every day at noon. The app claims 6M users in 7 countries and raised $9M.