Which One to Use for
an iOS Mobile App?                 
  React Native and Swift are technologies that are popular for iOS app
   development. While React Native is a framework for JavaScript and
 Swift is Apple’s developed open programming language to develop apps
                             for iOS devices.
React Native                                      Swift
                                                              Point 1                                 Point 1
    With React Native, it’s                      Swift in native
     quite difficult to add                  development provides
   graphics. When it comes                  great performance over
    to adding dynamic and                       cross-platform
    graphic effects, Swift                       development.
        takes the lead.
           Point 2                                 Point 2
If you want to develop an app                If you just want to
for both Android and iOS, then            develop an app for iOS,
React Native is the best choice          then Swift will deliver high
 to opt for. It can provide you            speed as well as great
   with better development               performance for iOS app
    speed and performance.                      development.
           Point 3                                 Point 3
 React Native framework can                With Swift for native
    develop apps for Android             development, it is possible
  and iOS and decent native-              to leverage the device’s
   like UI, but it cannot reach          features and build a more
     the stability standard of              stable and appealing
               Swift.                            application.
           Point 4                                 Point 4
     The React Native app                   Swift is especially for iOS
 development cost is still less               applications, so there
  than Swift because React                   might be chances of a
      Native is based on a                   little high development
   conventional JavaScript                  cost compared to React
   framework and it allows                             Native.
     code reusability that
 ultimately reduces the cost.
           Point 5                                  Point 5
                                         Swift is specially designed
   React is mostly used for
                                             for building native
      cross-platform
                                           applications for iOS
        development
                                                   devices.
                               References
          https://enacteservices.com/blog/react-native-vs-swift/