Square Enix promised last early to bring the browser RPG Kingdom Hearts: Unchained x[chi] over West, but with much more than that to go on. They've announced today that the game will be brought to iOS and Android mobile platforms for North America on April 7th. Made as a free-to-play game, players will be able to create a Keyblader wielder and fight the Heartless in a time before the Keyblade War. Related content to x[chi] will be available in the upcoming release of Kingdom Hearts 2.8 HD later this year.
Source: Kingdom Hearts Unchained X[chi] Launches In North America On April 7 - Siliconera