It’s common for these free apps to try and sneak in extra software you don’t want during the installation process. For example, a popular cleaning app will attempt to install a partnered antivirus program if you click “I agree” during one of the steps. This can be especially frustrating if you already have an antivirus service installed, as the new service will attempt to replace your existing platform.
The solution? Don’t mindlessly click “I agree” during installations, and read each screen carefully to avoid problems.