Toydea’s smartphone game the Dragon Fang going to moves from the smartphone platforms to the New Nintendo 3DS on December 14, 2016 in Japan.
The game will be available as FREE TO PLAY title from the Japan Nintendo eShop only and while it will be free it will be available only for the New 3DS owners as we wrote it.

The game’s content and everything will be the same as in the iOS / Android version of the game and you can buy extra items and service for real money.
Toydea didn’t say if you can link your SP version Dragon Fang with the new 3DS version so you may have to restart the game on 3DS.