Chuck, as Sam mentioned regarding UC, it is mostly used on mobile devices even in India. The reason behind it is that UC is lightweight and provides better performance on low-end devices.

The usage count definitely will always be high as it is India and China the most populus countries in the world we are talking about. :) 

Basically, if we are planning to add UC to our list we would just need to stick to the mobile version. But most of the population who will be using adapt or will be given elearning course built in adapt as part of their trainings would be using Chrome or other browsers rather than UC.

P.S. The above statement is purely my personal opinion. No one else is responsible for this statement.

Cheers!

Aniket