Foldable phones aren't worth much without apps that can take advantage of their screens -- Huawei even postponed the Mate X to give app makers more time to optimize their titles. That might not be much of a problem now that the revised Galaxy Fold is finally ready to make its debut. Samsung revealed that it has worked with Google and developers to bring Fold support to "hundreds" of apps, including big names like Amazon Prime Video, Facebook, Spotify and Twitter. This comes after Samsung and Google set up test labs that have spent months helping app makers fine-tune their work for the Fold.