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GSmartControl vs HDDScan: catalog facts
GSmartControl	HDDScan
Free Free and open source.	Free Freeware with no paid edition.
Windows, Linux	Windows
Highlights SMART anomalies automatically Runs drive self-tests from the interface	Surface tests in read, verify and erase modes Shows SMART attributes and drive temperature
Depends on smartmontools being installed Beware of a phishing site using a similar name	Windows only RAID volumes and USB flash drives get surface tests only
Downloadable app	Downloadable app
Open source	Closed source
License: GPL-3.0	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 23, 2026

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