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GSmartControl vs Hard Disk Sentinel: catalog facts
GSmartControl	Hard Disk Sentinel
Free Free and open source.	Freemium A limited free version exists. The Professional edition is a paid licence.
Windows, Linux	Windows, Linux
Highlights SMART anomalies automatically Runs drive self-tests from the interface	Health and estimated lifetime per drive rather than raw S.M.A.R.T. values Sees drives behind many USB enclosures and RAID controllers
Depends on smartmontools being installed Beware of a phishing site using a similar name	The free version is limited; most features need the paid Professional edition
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.