Compare software

Diodon vs Qopy: catalog facts
Diodon	Qopy
Free Free and open source.	Free Free to download; source published on GitHub.
Linux	Windows, macOS, Linux
Available in the Debian and Ubuntu repositories Lightweight GTK application	Runs on Windows, macOS and Linux Builds for arm64 Windows and Apple Silicon
In low maintenance mode with no new features planned Built around the Unity desktop	Younger project with a smaller community than established tools No mobile apps
Downloadable app	Downloadable app
Open source	Open source
License: GPL	License not stated
No account needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 24, 2026

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