How to create ios App for Shopify Store?

Hello Community members, I want to ask a question that how to create ios app for shopify store? I'm running a shopify store name nowgetone.com (Click Here) to visit website.

My main point is the 80% of the traffic on my website is coming from moible ios devices, I'm thinking to convert my site into an ios app. How can I do it or what should be the advantages and disadvantages of this.

Please Let me know about it so I can start working on it as I don't want to loose customers.

Thank you.