A free app for Android, by ModooPlay.

Zombie Survival is an idle shooter game that players can play in offline mode. Zombies, also known as walking corpses, have invaded the city. They are extremely aggressive and can quickly kill a person. You, as the leader of a small team of survivors, must prevent the city from falling to the zombies. To do so, you will have to defend the city against hordes of zombies. 

You will need to use different weapons to kill the zombies. As you progress through the game, you will be able to upgrade your weapons. You will also be able to choose between two gameplay modes: Idle and Shooting.