I am a developer. My advice is to stick with one web server version. Make it "mobile aware", which for an application like this is not overly complicated these days ( with new CSS/HTML5/JS/etc. ). But it is a whole lot easier, and cheaper, to do just-web than to have parallel development on both a web version and an Objective C version or whatever else the app is written in. IMHO, YMMV.
I have never used your app, your website works fine on my mobile smartphone.
I have never used your app, your website works fine on my mobile smartphone.