Choosing between ios/android and Flutter is not simple. Neither is a one-size-fit-all solution. It would be impossible to suggest one or the other without first analysing particular project’s requirements.
Choosing cross-platform development (Flutter) offers a number of advantages – lower cost, faster time to market, etc…, and if applied to the right type of project, will result in high-quality, marketable mobile product. In my opinion, stick with flutter and try to resolve those problems. Here are some useful links,
Map: *https://pub.dev/packages/mapbox_gl *https://www.raywenderlich.com/4466319-google-maps-for-flutter-tutorial-getting-started
Payment Service: *https://developer.squareup.com/docs *https://github.com/square/in-app-payments-flutter-plugin *https://pub.dev/packages/stripe_sdk