Kemco are celebrating passing 1 Million downloads for Band of Monsters by offering it free.
The monster taming RPG is available on both iOS & Android for no charge. Yes, it is a little Pokemon-esque, with there being over 170 monsters in total for you to collect and battle with. You can also cross breed those you catch to create new monsters. Surprisingly, there's an online component that allows you to take your party online & battle other tamers. For the price, I'd say its worth a try!