Shall I code native or can I use my website for an app?

We are after some advice...

The question... shall we build a native or hybrid application for IOS / Android or is there a way I can simply pull the website / web version in and use this to power the app?

Background... the service offers data based on data inputted by the user. Simple jQuery with a touch of PHP. The web version works perfectly and is super lightweight. Having read many articles I would appreciate some advice... is it worth us building a native or hybrid app or is there a simple solution that the website could be the heart of? We would want to sell the app hence why we aren't just sticking with the website.

Any advice / direction would be appreciated.