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1Blocker vs AdGuard Browser Extension: catalog facts
1Blocker	AdGuard Browser Extension
Freemium Free tier available; full feature set requires a subscription.	Free The browser extension is free to install.
macOS, iOS, Browser extension	Browser extension
Blocking happens on-device rather than through a proxy server Large built-in rule set with granular customization	Blocks ads, pop-ups and trackers Cosmetic filtering hides leftover page elements
Limited to Safari rather than all browsers Full rule customization requires the paid tier	Only filters inside the browser, not other apps System-wide filtering requires AdGuard's separate apps
Downloadable app, Browser extension	Browser extension
Closed 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.