title: How to call a payment gateway within the app?
body: <p>My app is a simple booking system which enables users to pay from their credit cards. (This app is a module of a already finished web application) </p>
  
  <p>Question is How to call a payment gateway within the app? </p>
  
  <p>Is it possible to access the services from the existing web application and proceed with the payment?
  OR
  Is is advisable to use a webview with the URL of the existing web application?</p>