In IOS 10 beta 1 there is a issue with viewport scaleing (hopefully just a bug to be fixed), to which users in wkwebview web apps can now zoom into the app ignoreing the viewport meta tag, makes apps highly unusable.
IOS 10 beta 1: user viewport scaling issue
@webkit reported in a tweet that this is the new behavior in iOS 10. I'm not sure if there is a way to force iOS to respect the viewport, but if there is, I need to find it!
This is expected. Apple specifically ignore that now on the grounds that it's better for accessibility, which I agree with.
me too :/
not for web applications.... very bad for user experience