Powerful but Needy
As you might imagine, an app that scans and compares data files is VERY disk intensive. As long as the app is open, it automatically monitors files, and that means other apps will be slow or unresponsive.
That said, this is very usable, and fairly intuitive, although a little aggressive on the deletion.
Will It Work about
Gemini 2: The Duplicate Finder, v2.2.2