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BlockSite vs one sec: catalog facts
BlockSite	one sec
Freemium Free to start; BlockSite Premium is a paid subscription with a 30-day guarantee.	Freemium Free to download, with optional paid features.
Android, iOS, Browser extension	Android, iOS
Blocks both websites and apps Focus Mode for timed work sessions	Adds friction before opening chosen apps instead of only hard blocking Can also block websites
Some features require a paid Premium subscription Closed-source commercial product	Closed source Pricing for extra features is not detailed on the homepage
Downloadable app, Browser extension	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it 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 October 2, 2026

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