How do you tell if an app is disguised?

How can one discern whether an app is actually a disguised version of something nefarious? In the realm of cryptocurrency and finance, where scams and fraud are rampant, it's crucial to maintain vigilance. Are there specific indicators or warning signs that one should be aware of? Are there any reliable methods or tools that can help in identifying disguised apps? What measures can individuals take to protect themselves from falling victim to such apps?