Have you considered learning Flutter for mobile app development?

Flutter is a modern framework from Google for cross-platform mobile app development using the Dart language. It allows creating apps with a single codebase for Android and iOS, providing high performance and flexible design.

Learning Flutter can be useful if you want to quickly develop beautiful and responsive mobile apps without the need to write separate code for each platform. Additionally, Flutter is actively developing and has a large community.

If you are already familiar with Android development in Java or Kotlin, learning Flutter will expand your capabilities and allow you to create apps faster and with less support cost.