How to understand that the mobile application code is obfuscated?

Question

Android

I'm wondering how to understand that the code of some mobile application is obfuscated, well, that is, let's say I read the code when I start the application, it seems to be nothing ordinary, and it is not clear whether it is obfuscated or not. + Question. If I can add my own piece to the application code (which is naturally not obfuscated in any way), and the application works as it should - does this mean that the application is not obfuscated? (It seems to me not, because after reading a little about obfuscation, I noticed that the part data is simply encrypted and then decrypted, that is, this does not affect the new code in any way.

Answer 1

Look at obfuscation using the js code example ( https://habrahabr.ru/post/112530/)
If you can read it without dancing with a tambourine, then the code is either not obfuscated or obfuscated, but to a small extent. On the second part of the question: you yourself answered it =)