Which app are fake?

I'm a bit skeptical about the various apps claiming to offer cryptocurrency trading and investment opportunities. Given the increasing popularity of cryptocurrencies, I'm wondering which apps are fake and should be avoided? It's essential for me to know which ones lack credibility, security, and genuine services so I can steer clear and protect my investments. Can you shed some light on this issue? It's crucial for me to make informed decisions and not fall prey to fraudulent schemes.