Mobile version of wordpress site

My site is on wordpress and I need to now if there’s an easiest/quick way to make/launch the mobile version of the site.

If you need native app then you can use this ready native code for mobile

If you need mobile website version then you just need to install responsive wordpress theme or install this plugin

You would suggest to try in your case WordPress Mobile Pack plugin, WP Mobile Detector or WPTouch.

If you’re looking for a simple mobile version of site, go for the Jetpack plugin. It’s totally free.