If they give away the app, it's very risky. We don't know whether the application is truly safe when used or whether something is working in the background. We also can't install it on the computer where we usually work because it will impact our computer if something happens. I also don't trust them, especially if I don't know them well. It's better to look for information from other places so that we won't depend on applications like that and also for the security of the data on our computer or cell phone.