Different UI for same version of YouTube official iOS app I have the same version (10.22.11614) of the official YouTube app in my iPhone 6 and iPhone 5, but the UI is not same in both of my phones. 

My iPhone 5 has the new material design and my iPhone 6 has the old UI.

Why for the same version I'm having two different UIs?

iPhone  5



iPhone 6
According to this blog Google is testing the Material Design YouTube app.

One of my phone is part it the other one is not.