Silicon Studio, the developer of Bravely Default on the 3DS, is making a new free-to-play monster-collecting RPG for Android and iOS. More details at Siliconera. http://www.siliconstudio.co.jp/socialgame/monstertakt/
Now out in the Google Play store in Japanese: https://play.google.com/store/apps/details?id=jp.co.siliconstudio.monstertakt
It's already out in Japan. Nothing about US release yet though. App info is currently processing and/or the app is not yet fully available for sale on the US App Store.