Simply determines if a user agent is for a mobile device.
Comes ready with a module for Rails 2 & 3 to enable multiviews (respond_to with a custom mimetype) for mobile devices (see Synopsis).
Fast & Lightweight (doesn't use anything like WURFL, which would be overkill for a quick check)
The lightweight tests used in IsItMobile are almost completely based on the work of Andy Moore in an article at www.andymoore.info/php-to-detect-mobile-phones/. I added a couple more user agents to the mix and obviously Rubified it.
It recognizes 99% of the mobile user agents from www.zytrax.com/tech/web/mobile_ids.html It has nearly no false positives using the user agents from www.zytrax.com/tech/web/browser_ids.htm The ones that don't quite pass are very rare (and some are even questionable appearing in their respective lists)
sudo gem install contentfree-is_it_mobile –source gems.github.com
With Rails 2.0, simply add this to config/environment.rb:
config.gem 'contentfree-is_it_mobile', :lib => 'is_it_mobile/rails', :source => "http://gems.github.com"
Then, just create your views using suffixes of mobile.erb instead of html.erb
You can also just use IsItMobile directly: IsItMobile.mobile?( 'NokiaN90-1/3.0545.5.1 Series60/2.8 Profile/MIDP-2.0 Configuration/CLDC-1.1' ) # => true
If using Rails, version must be >= 2.0 for multiview capability