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Acutis Firewall vs CIRA Canadian Shield: catalog facts
Acutis Firewall	CIRA Canadian Shield
Free Free and open source, listed on F-Droid under the MIT licence.	Free Free, provided by a national not-for-profit.
Android	Windows, macOS, Android, iOS, Browser extension
Filtering runs locally on the device Blocks adult, malware and dangerous domains	Blocks phishing, malware, botnets and scam sites Optional adult content filtering for families
Small, young project Uses the Android VPN slot, so it cannot run alongside another VPN	Built primarily for Canadian users No custom blocklists or per-domain control described
Downloadable app	Downloadable app, Hosted service, Browser extension
Open source	Closed source
License: MIT	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Needs internet
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 24, 2026

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