Phaseable
AppsBusyShield
Web App
Google · Outlook · iCloud

BusyShield.

Never get double-booked again. BusyShield keeps every calendar in sync — showing when you're busy without sharing what you're doing.

Launch BusyShieldSee All Apps

Works in any browser · No extensions required · Complies with Google's Limited Use policy

How It Works

One sync. Every calendar.

Connect once and BusyShield keeps your availability consistent across every platform — automatically.

🔄

Cross-platform sync

Works with Google Calendar, Outlook / Microsoft 365, and Apple iCloud — all three, simultaneously.

🔒

Privacy-first

Only your free/busy status is shared. Event titles, notes, locations, and attendees stay completely private.

🚫

Opaque busy blocks

Creates generic "Busy" blocks on mirrored calendars — no details leak, ever.

♾️

Echo prevention

Smart loop detection prevents duplicates when syncing across multiple accounts.

↩️

Safe & reversible

BusyShield only touches blocks it created. Disconnect any time and every created block is removed.

⚡

One-time setup

Connect your calendars once. Sync runs automatically from then on — nothing to maintain.

Privacy

Busy or free. Nothing else.

BusyShield never reads your event details — only whether a time slot is occupied. What your meetings are about, who's on them, and where they happen stays completely private.

Credentials are encrypted and isolated per account. Your data is never sold. Access can be revoked at any time — and disconnecting removes every block BusyShield ever created.

Stop managing calendars manually.

Connect once. Stay in sync everywhere. No double-bookings, no detail leaks.

Get Started at BusyShield.com