Hambo pretty much covered everything I've experienced so far. It's really fun. It has the same Monster Hunter gameplay of accepting requests and killing/capturing monsters, only this is a turn based JRPG. Tons of different equipment to craft. There is a premium currency, but as far as I can tell, it's not necessary for progression. Premium version gives you 1000 to start off with, enough to get some of the nice items in the shop (permanent exp boost, drop rate, etc.). You could also use it to buy gear. I haven't spent any myself, however. Another interesting mechanic to note it that the "Energy" you use to cast spells and skills is also used to purchase items/equipment, and is shared across your entire team. Also as a side note, the game still seems to have sound, even if you mute your device and completely lower your volume.