They're hundreds of horror games for smartphones I will pick my five favorite ones.
1.Slenderman must die basically like the original Slenderman game but you actually get to kill him.
2.Five nights at freddy's although I haven't played this game I heard alot of good things about this game.
3. Contact killer zombies if you love FPS zombie games then this one is foryou.
4. Eyes the horrible game the first time I played this game it scared the hell out of me.
5. Silent insanity P.T this is a very fun game you fall asleep at work only to find out that you're co workers have been killed by a chain saw wielding maniack.