Since yesterday I started playing Please Stay Calm on my phone. It’s a zombie game, kind of turn based. You have a limited amount of energy (and health of course) that you can use to scavenge for stuff or to hunt/kill zombies. Other than most games, the scavenging and hunting is done GPS based, so the game will list locations (shops, streets, etc) you will know.
Of course you can connect with friends (via Facebook or the app). You need to level to progress. You need money (found by scavenging or by selling stuff you found) to buy weapons, build safehouses, etc.etc.
It’s a simple game to play, the interface is not difficult and you don’t need superfast reflexes to dodge the zombies like most other games. I like it. At the moment I’m only at level 4, but for less than a day playing that seems okay (maybe it’s not).
Have a look here: http://pleasestaycalm.com/ and find the app in the Playstore or on iTunes.