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GSmartControl vs HD Tune: catalog facts
GSmartControl	HD Tune
Free Free and open source.	Freemium A free version is available. HD Tune Pro is a paid licence.
Windows, Linux	Windows
Highlights SMART anomalies automatically Runs drive self-tests from the interface	Transfer-rate graph across the whole drive shows slow regions clearly
Depends on smartmontools being installed Beware of a phishing site using a similar name	The free version is old and only the Pro version is still updated Windows only
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	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 23, 2026	Official website Full listing and sources Checked September 22, 2026

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