Performance Issues while viewing Articles details on iOS app using REST API

Hi,
We have a mobile application (iOS) landing screen which retrieves Articles and Events data from a WordPress instance in Azure through REST API. We are facing some performance issues while loading this page. We are using Simple JWT token for authenticating the User with WordPress. Another issue we are facing is that we are having Like, Dislike and Number of Comments icons on the mobile application landing screen.. and we are somehow not able to post a Like or Dislike and show the same by changing the icons at the Mobile side.
If the user clicks on any Article link then we are able to open a new WebView and send the JWT token so that the page opens as a logged in User. The user is then able to click on Favorites, Like, Dislike and also add comments as a logged in user.
Can someone help us integrate our App with WordPress by giving us some pointers towards the required solution.

Thanks
-Sachin.