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Czkawka vs Gemini 2: catalog facts
Czkawka	Gemini 2
Free Free and open source under the MIT licence, with no advertising.	Freemium Free download, with a paid license available to buy from MacPaw.
Windows, macOS, Linux, Android	macOS
Finds duplicates, similar images, similar videos and similar music Written in Rust and multithreaded, with caching for repeat scans	Finds similar files as well as exact duplicates Scans Photos and Music libraries
The Czkawka GTK interface ends at 12.0; new work goes to Krokiet Similar-image matching produces false positives you must review	macOS only Full use requires a paid license
Downloadable app	Downloadable app
Open source	Closed source
License: MIT	License not stated
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked September 21, 2026	Official website Full listing and sources Checked September 24, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.