Out of boredom this weekend I downloaded a bunch of Android games to see if any of them were good. Most of them were dull, but I stumbled upon one that I've become more than slightly addicted to. It's a Korean puzzle/RPG/TCG type... thing. As most of these games are, they encourage a certain amount of co-operation with friends. I'm not exceptionally keen on adding a bunch of random people, so I thought I might ask around the site to see if anyone plays it.
Here's the link to the Google Play page for the game. I dunno if it's on iOS devices, but I'd guess it is.