Bandai Namco Games' official Youtube channel has posted recently the video promo updating the social Kamen Rider mobile game entitled: Kamen Rider Bout! The social RPG allows you to place as Kamen Rider Gaim Kiwami Arms fighting against a horde of monster to collect Rider special powers and abilities. Here is the video for your entertainment.
Kamen Rider Bout can be download and used on your iPhone 3GS, 4, 4S or 5s/c and up for the iOS and Android 2.3 and up for the Android. Check out the official website for more info.Note than iOS version seems to be region locked.