Kingdom Hearts Unchained X releases September 3 2015 in Japan at noon (September 2 11PM EST). According to @KHUX_PR, iOS (iPhone) and Android users will be able to download Kingdom Hearts Unchained X via the Apple App Store and Google Play Store respectively during this time. Further updates reveal that the app has been released early for download. It may be a while for the app to be fully visible, and it is a pre-download and the full version won’t be available til the scheduled time mentioned above. The image above features the official Kingdom Hearts Unchained X App Icon. The overall app will be roughly 800 MB.
Nomura also released some artwork featuring Ephemera and Chirithy from Kingdom Hearts Unchained X and Sora and Chirithy to commemorate the release!