I would recommend this app because you can unlock different guns and and kill off zombies in different maps like in an airport or in an abandoned shack. You can play on your own or online with others. This app is available on iOS.
In Race Or Die 2 you race people across the world and earn money buy doing jobs. Join my chat room in the game it is called Irish Ninjas. It is available on iOS.
The Creators of angry birds have made a new game called Amazing Alex. It is a good game to pass the time. It ia available on Android and iOS.