01
Scan
Scan every connected account in one pass. Keep checking new and changed calendar invitations with built-in signals, your rules, and cached malicious-domain intelligence.
Calendar spam protection
Stop junk calendar invitations.
Scan invitations across every connected calendar account, understand suspicious results, and save rules to trust, review, or block senders and domains. Connect Microsoft and Google calendars on the web, with optional mailbox invitation scanning and cleanup under your control.
Full-feature trial. No credit card required. $9.99 for your first year. Sale through December 31, 2026, at 11:59 p.m. Eastern. Then $19.99 per year until canceled. No coupon required.
Annual subscription
Regular price: $19.99 per year$9.99for your first year$9.99 for your first year. Sale through December 31, 2026, at 11:59 p.m. Eastern. Then $19.99 per year until canceled. No coupon required.
Subscribe02
Understand
See a 0–100 risk score and the specific signals that produced it.
03
Control
Keep, remove, report, trust, or block with clear consequences before you act.
Protection under your control
Automatic monitoring. Clear decisions.
Background protectionNew and changed invitations are checked while the calendar filter is on.
Known malicious-link intelligenceCalendarGuardian downloads the CERT.PL Warning List and matches invitation-link domains locally. Invitation data is not sent to the feed provider.
Your rulesTrust a sender or domain, block a sender or domain, and add words or phrases that should always be reviewed. CalendarGuardian rules do not create provider-wide email blocks.
Optional mailbox protectionScan invitation emails in selected folders. Separately enable cleanup to move invitations matching your block rules to Trash. Microsoft, Google, Yahoo, and iCloud connections require your authorization.
Your dataPause filtering, disconnect a calendar, withdraw consent, or delete all CalendarGuardian data.
Your calendars, across devices
CalendarGuardian for iOS and Android.
Choose your device. Official download links appear here when each app is released.
iPhone and iPad
App Store release pending
Android
Google Play release pending
One plan
Everything CalendarGuardian offers.
One annual subscription protects one user and the supported calendar accounts that user connects. No feature maze and no artificial tiers.
Regular price: $19.99 per year$9.99for your first year$9.99 for your first year. Sale through December 31, 2026, at 11:59 p.m. Eastern. Then $19.99 per year until canceled. No coupon required.Start Free Trial