The mobile device security firm iVerify has been offering a tool since May that makes spyware scanning accessible to anyone—and it's already turning up victims.
The actual software to scan your phone has been around for a while, you can use it entirely for free and as often as you want: mvt.
I'm guessing whatever this ziffdavis trash is, its probably using the same thing just with a nice coat of paint and and interface that the sort of mouth breather who'd pay for security theater apps can use.
There's a section near the bottom about how to install and you'll also want to read through the documentation on how to use it.
What's not in the instructions: First, you'll need to have Python installed, then you'll be able to execute that command to download/install the module.
At a quick glance, this is some software that you install on a computer, then you connect your phone to it and execute the command to perform a scan.
You'll want to get comfortable with using a terminal window or PowerShell/CMD prompt, etc.
You may need to look up some commands on how to change your directory to the root directory of the phone before executing any scans.