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HDDScan vs GSmartControl: catalog facts
HDDScan	GSmartControl
Free Freeware with no paid edition.	Free Free and open source.
Windows	Windows, Linux
Surface tests in read, verify and erase modes Shows SMART attributes and drive temperature	Highlights SMART anomalies automatically Runs drive self-tests from the interface
Windows only RAID volumes and USB flash drives get surface tests only	Depends on smartmontools being installed Beware of a phishing site using a similar name
Downloadable app	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
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.