Guardian Cross is a new Square Enix card game for the iOs, they say they're hoping to release it for android later.
"Guardian Cross is a creature-based card game that features a fully unique battle system in which players take on the role of “tamers” who capture, raise, and control powerful beasts known as “Guardians.”In addition to quests to unlock the secret of why the Guardians have woken after a millennium of slumber, other features include a coliseum system that allows players to challenge other tamers from around the world in head-to-head combat. "
The game features a "hunting" system to get cards rather than a buy/open card packs, so you kinda have to work for it, i personally enjoy it.
The artwork is also really nice and features different elements typical of RPGs, ie: fire/water/lightning/darkness/poison...
since this is a SE game, they also have "growth" styles/personalities so it's not just a numbers game.
Currently they have a promotion going on, since the game just came out.
Like any other card game, this one has referral codes and you get a decent starting card, then they use a cumulative system where each code after gets you a little better card, and the daily login bonus is a bit better than the previous day (unlike RoB using the same bonus each day)
Again, this game is only for Iphone/iOS, but if you want to start up the game or even just try it/help me out.
Feel free to pm me for more details.