What's the easiest way to detect the user's operating system in Rails 3?

Question

Simple Rails app, mostly scaffolding. I want to detect whether the user is using Android or iPhone to access my app. What\'s the easiest way to do that?

Answer 1

the user_agent gem is useful for mobile vs. desktop..., and browser version. but doesn't do anything for OS https://github.com/josh/useragent