While not a full fledged console like RPG, you could try out Brave Frontier. Yeah it is fairly simple, but it is fun. Been playing for almost a year now, but I won't lie, I am P2P. Likely dumped about $100 into it over the course of the year. Only game I ever did that with. Easily playing when going F2P though as they constantly have events with catchable strong powered units. Coming up soon is a colaboration event with SEGA, enabling players to get Hatsune Miku, who looks to become the games top leader unit. 
You could also give Knights of Pen and Paper+1 a shot too. I loved that title.
https://play.google.com/store/apps/details?id=br.com.beholdstudios.knightspp&hl=en
iPhone = Great gaming device. Don't agree? Who cares, because you're wrong.
Currently playing:
Final Fantasy VI (iOS), Final Fantasy: Record Keeper (iOS) & Dragon Quest V (iOS)
