In many cases mobile applications can be pulled from a server. The pages are typical html or php pages and are smaller than a typical page. The beauty is that while most believe these pages to be harder to make than a typical site, it is the opposite.
If the user is accessing your site via a browser you can build a simple site with basic links optimized for a small screen. Keep graphics to a minimum.
What is typical is to use a subdomain of your current domain, just with an “m”. So m.mysite.com , and you can even host the subdomain on another account – get a 10% discount with this godaddy hosting coupon, and accounts are less than $60 for an entire year.
When it is that simple to create a mobile application and the world is going mobile, what are you waiting for?