Does anyone know if it is possible to check for /one/one.app in the URL via apex code?

I've tried the following but to no avail!

URL.getSalesforceBaseUrl().toExternalForm())
URL.getCurrentRequestUrl().toExternalForm()
URL.getCurrentRequestUrl().getPath()

I know I can do this via javascript but was wondering if it is possible using apex.

Thanks
Tony

I know you can go to the Critical Updates screen in Setup to see the list of available updates, but what I'd like to know is if there is any way you can check if a critical update has been enabled via apex code?

Thanks
Tony