DAY-R SURVIVAL!
Cant believe, i didnt see anyone mentioning this before...
Its a really well made Postapocalyptic Rpg, playing in the Russian wasteland with realistic crafting engine and its really atmospheric in general(especially the soundtrack). Can only recommend... Its a bit slow paced, but still gets updates and its free (premium i like 3€ i think)
Minecraft, exiled Kingdoms and this one are my personal top3 android games.