In 2016 August going to release the Japanese version Idle Monster smartphone game on iOS and Android devices. The official pre-registration event started today where you can get extra items but the details will be published later.
This title is an easy operation, cute smartphone RPG game with rich combat and edit system. You can create your own character with several classes like mage, archer, swordman and others. In the game you can have your own team but you can also add your own pet to your main character as an extra support unit.
You can find the details about the pre-registration on the official Facebook page of the game. If you are interested in it, register now and wait until August (for the Japanese version). The game available already in English.