Depends on what you want to do. The biggest advantage with native languages like kotlin or Swift is that you can leverage the platform APIs and implement intere

Depends on what you want to do. The biggest advantage with native languages like kotlin or Swift is that you can leverage the platform APIs and implement interesting features. That being said, recently I used flutter for a small ~5KLOC project and I was impressed. It was the most fun and productive experience I had in years. The tooling is amazing. If your app isn't really using any platform specific functionality, give it a try.