Respected Sir/Ma'am,
I have been in this industry (java app development) for 3 years and creating such applications are my daily practice. This is my first time as a freelancer and hence you can see that I do not have any ratings/testimonials to show you. I can assure you that if you work with me once, you will always want to work with me for these kind of projects.
Now, coming to the specifics regarding the project;
Since it wasn't mentioned in the job description, can you please tell me if you already own the website, if you do, does your website have JSON response protocol?
Generally, for such type of projects, I recommend using a basic web-view template if the web-site doesn't have JSON connectivity, or using a general API response method if the website has a JSON connectivity.
What I mean to say is, if you already own a website and it doesn't have an API response, it might be a bit expensive to migrate to such a service. So, I would recommend you to choose an app having basic webview template.
However, if your website has the ability to respond to API requests, then I can make a normal of application for you, examples of such apps include facebook, whatsapp and pretty much every app.
If you send me the url of your website and some information regarding the basic functioning of your website, I can guide you as to which method might be best.
I already have a basic XML file ready that might serve as a background in-case you decide to use web-view method or API resp.