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1Blocker vs Lockdown Privacy: catalog facts
1Blocker	Lockdown Privacy
Freemium Free tier available; full feature set requires a subscription.	Freemium Free tier available; premium tier unlocks more filtering options.
macOS, iOS, Browser extension	macOS, iOS
Blocking happens on-device rather than through a proxy server Large built-in rule set with granular customization	Blocking happens on-device instead of through a third-party VPN server Open source, so its blocking behavior can be independently verified
Limited to Safari rather than all browsers Full rule customization requires the paid tier	Advanced features require the paid tier Only covers what its firewall rules recognize
Downloadable app, Browser extension	Downloadable app
Closed source	Open 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 22, 2026	Official website Full listing and sources Checked September 22, 2026

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