if you've already downloaded it, and run a security scan (Malwarebytes or Bitdefender for Android). Change any passwords entered on that device.
It's great that you're approaching "Umobix APK Free" with a critical eye. You're right to call it an "interesting write-up"—because anything offering a paid, premium monitoring solution like Umobix for free as an APK is almost always a trap. Umobix Apk Free
If you can't afford it, use a legitimate free alternative (like Google Family Link for Android, or Apple Screen Time). There is no safe, working, "free APK" for paid monitoring software. if you've already downloaded it, and run a