Last month, about 60% of our iOS users already used Swift, and the gap in favor of Swift is growing very quickly (it was 50/50 in November 2015). Some of our Swift users you’d probably expect: apps from Vimeo, Digg, Hipmunk or Misfit wearables. But in the past 1-2 months we’ve seen Swift + Realm apps from some real large companies like Cisco, the NFL, NBC Universal, GoDaddy and 7-Eleven. I hope this helps!