After years of buying hard drives and moving files around, digital hoarders like myself eventually wind up with duplicate files all over the place. A few gigabytes here and there can add up, so Gemini aims to help you find and delete duplicate files across devices. It's a beautifully designed app, and if you're doing basic directory comparisons, is fast as lightning. To start, you just drag a few folders onto Gemini. It'll start scanning with a big circular progress bar moving around. One of the awesome features I've not seen elsewhere is the ability to see the results of a scan and do something about them while the app continues to scour your folders. Gemini is fast even though you can be impatient, which is a plus if