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StayFocusd vs SelfControl: catalog facts
StayFocusd	SelfControl
Free The site describes it as always free.	Free Free and open source, supported by donations.
Browser extension	macOS
Daily time limits as well as outright blocking Nuclear Option for a full block over a set period	Block cannot be undone until the timer expires Survives restarts and deleting the app
Built for Chromium browsers such as Chrome and Edge The website uses advertising and analytics cookies	macOS only No way to end a block early if you set it wrongly
Browser extension	Downloadable app
Closed source	Open source
License not stated	License not stated
Not stated if an account is needed	No account needed
Not stated if it works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 1, 2026

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