How to protect app code againts reverse engineering?

[Anke]

@vknow360

But one good thing is that App Inventor2 uses ProGuard (if I am not wrong).

What to keep proguard

At a minimum, you’ll want to keep everything that is public in the com.google.appinventor.components.runtime and com.google.youngandroid packages, as well as any class that extends Form in the app-specific package. We don’t run proguard on apps, and don’t really have the intention to do so, so I can’t give you much advice beyond that.