What are libapp.so and libflutter.so?

Question

My Flutter application bundle contains native libraries, libapp.so and libflutter.so, each around 8-9MB. How can I find what is contributing to size of those files or which dependencies they're coming from?

Answer 1

libflutter.so (the flutter engine)

libapp.so (your code).

Answer 2

Flutter is a portable UI tool kit, means everything that flutter depends upon must be included with in the APK file. So every flutter will have those mentioned .so files.

The mentioned .so files includes Dart language dependency, skia engine, flutter framework, platform related native code etc.