Wirelessly posted (Mozilla/5.0 (Linux; Android 4.4.2; Nexus 5 Build/KOT49H) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/32.0.1700.99 Mobile Safari/537.36)
It's working for me on the Android app. Maybe iPhone is different? I think I might have had to close the app and reopen it to get it to take effect.
Weird, I'm on the Android app too...I even killed the app and restarted, same thing.
What version are you on?