Three. Started with the Otterbox Defender right when I got the 5s on launch. Then I went for the Lifeproof Fre and it's been my go-to case ever since. I've also got the SwitchEasy Numbers, but immediately missed the all-around protection and peace-of-mind the Lifeproof gave me. Will probably use the Fre until I sell the 5s and get the 6, and even then, I'll probably get the Fre or similar waterproof case for the 6.