Developers often underestimate how simple it is to decompile an Android application and expose its business logic or hidden secrets. This presentation is a live demo that answers a crucial question: What does the reverse engineering process look like in practice, and how real is the threat of leaving sensitive data in an application’s code? Using freely available tools, we’ll walk through the process of decompiling a custom-made “HackMe” app. We’ll uncover hidden passwords that grant us access to the app’s subsequent screens, comparing each step to the original source code. This session proves that reverse engineering is surprisingly accessible and that “hiding” anything in app code is merely an illusion of security. The audience will gain practical knowledge about common attack vectors, empowering them to write more secure code. This talk also highlights the business risks associated with intellectual property theft and data breaches, making a clear case for investing in security audits and developer training.