Is_it_mobile Released

is_it_mobile, version has been released!


Simply determines if a user agent is for a mobile device.

Comes ready with a module for Rails 2.0 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 I
added a couple more
user agents to the mix and obviously Rubified it.

It recognizes 99% of the mobile user agents from
It has nearly no false positives using the user agents from
The ones that don’t quite pass are very rare (and some are even
questionable appearing in their respective lists)

With Rails 2.0, you can use its multiview capabilities by simply
adding this to your app:

  • in config/initializers/mime_types.rb
    Mime::Type.register_alias “text/html”, :mobile

  • in app/controllers/application.rb
    require ‘is_it_mobile’
    class ApplicationController < ActionController::Base
    include IsItMobile::ForRails

Then, just create your views using suffices of mobile.erb instead of

You can also just use IsItMobile directly: ‘NokiaN90-1/3.0545.5.1 Series60/2.8 Profile/
MIDP-2.0 Configuration/CLDC-1.1’ # => true


sudo gem install is_it_mobile

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