Compare software

ScreenZen vs BlockSite: catalog facts
ScreenZen	BlockSite
Free Free with no subscription, supported by donations.	Freemium Free to start; BlockSite Premium is a paid subscription with a 30-day guarantee.
Android, iOS	Android, iOS, Browser extension
No subscription Blocks both apps and websites	Blocks both websites and apps Focus Mode for timed work sessions
Closed source Phone only	Some features require a paid Premium subscription Closed-source commercial product
Downloadable app	Downloadable app, Browser extension
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 October 2, 2026	Official website Full listing and sources Checked September 23, 2026

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