Square Enix has officially announced the first Kingdom Hearts game on iOS and Android devices is releasing later this year called “Kingdom Hearts Unchained χ”(Chi). The mobile title port of the browser game which only released in Japan will be available as a F2P with in-game purchases. The story told is from the “oldest times” of the series and leads into Kingdom Hearts III. Players will be able to strengthen their keyblades and obtain medals by exploring throughout the various Disney worlds.
A teaser site for the game just recently launched recently. Nomura did mention in the interview that a western localization is in the works and they are currently testing the game in North America, though no other details have been announced.