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Lockdown Privacy vs AdGuard Browser Extension: catalog facts
Lockdown Privacy	AdGuard Browser Extension
Freemium Free tier available; premium tier unlocks more filtering options.	Free The browser extension is free to install.
macOS, iOS	Browser extension
Blocking happens on-device instead of through a third-party VPN server Open source, so its blocking behavior can be independently verified	Blocks ads, pop-ups and trackers Cosmetic filtering hides leftover page elements
Advanced features require the paid tier Only covers what its firewall rules recognize	Only filters inside the browser, not other apps System-wide filtering requires AdGuard's separate apps
Downloadable app	Browser extension
Open source	Open source
License not stated	License: GPL-3.0
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 23, 2026

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