Google uses R8 (and previously ProGuard) to shrink and obfuscate Kotlin code before it reaches the APK. While a decompiler can still show you the logic, the human-readable names are gone forever unless you have the original mapping file. This is the primary defense developers use to protect their intellectual property. Ethical and Legal Considerations
If you want to see the Kotlin source code of an APK, follow these steps using Jadx: Grab the latest release from GitHub. kotlin decompiler apk
Converting DEX files into Smali (an assembly-like language) or Java bytecode. Google uses R8 (and previously ProGuard) to shrink