Google Calendar ↔ Android

Sync Google Calendar with Android (Unified Multi-Account View)

Get every calendar you care about into one Google account so your Android phone's calendar shows the truth, not three siloed views.

Published

How to sync Google Calendar with Android

About 5 minutes. No credit card required.

  1. Pick which Google account is the host

    On Android, your Google Calendar app shows events from every Google account you sign into the phone with. Pick the one you want to be the unified view - usually your primary personal Google.

  2. Sign in to SyncCal

    Open app.sync-cal.com and create an account with that Google address. Confirm it's the same Google account your Android device is signed into.

  3. Connect the host Google account

    Click "Add Google" and grant the calendar scope to your host Google account. This is the calendar that will receive mirrored events from your other systems.

  4. Connect each source you want visible on Android

    Add Outlook, iCloud, secondary Google accounts, or any CalDAV-supported source. SyncCal will mirror events from these into the host Google calendar.

  5. Enable Busy-title rewrite for privacy if needed

    If you'd rather not see mirrored event titles in your Google Calendar app (or have them visible to anyone with whom you share that calendar), turn on Busy-title rewrite.

  6. Refresh the Google Calendar app on your phone

    Open the Google Calendar app on Android, pull to refresh. Mirrored events appear within about a minute alongside your native Google events.

Why Android’s “add multiple accounts” doesn’t actually solve the problem

Android can sign into multiple Google accounts at once and the Google Calendar app will show events from all of them. But there are three real-world failure modes:

  1. Sharing. When you share your primary Google calendar with a partner or assistant, they only see events on that primary account, not the others you’ve added to your phone.
  2. Free/busy. Calendly, Microsoft Teams Bookings, and similar tools only see one calendar at a time. Conflicts on your other accounts are invisible to them.
  3. Cross-app visibility. If you ever switch to a different Android calendar app (Outlook, Samsung Calendar, Notion Calendar), the multi-account toggle behavior may not carry over.

Mirroring everything into one host calendar fixes all three. Your sharing recipients see the full picture, your booking tools detect every conflict, and any calendar client that reads your host account gets the truth.

What to put on a dedicated sub-calendar instead of your primary

Even with privacy rewrite, you may not want personal events landing on your primary Google calendar (the one your assistant and colleagues see). SyncCal supports targeting a sub-calendar:

  1. In Google Calendar web, create a new calendar called “Mirrored” under “My calendars”.
  2. Set its sharing to private (default).
  3. In SyncCal, point the mirrors at that sub-calendar.
  4. On Android, both calendars show in the Google Calendar app, but you control which ones are shared.

What this page is not

  • A guide to syncing calendar events between two Android phones. That’s a Google account problem, not a sync engine problem - sign both phones into the same Google account.
  • A way to mirror Android-only data (call logs, SMS) to calendar. SyncCal stays in calendar scope.

Questions about Google Calendar and Android sync

Why not just add Outlook directly to my Android Google Calendar app?

The Android Google Calendar app doesn't natively connect to Outlook accounts. Workarounds (subscribing to an Outlook ICS feed) lag by hours and don't include changes to existing events. SyncCal mirrors at the API level so propagation is near real-time.

I added a second Google account to my Android phone. Aren't its events already visible?

Yes, but in a siloed way. You can toggle each Google account's visibility on or off, and each account's events show with their own color. SyncCal goes further by mirroring secondary accounts INTO your primary, so colleagues who see your primary calendar (via Google Calendar sharing) also see your secondary commitments as "Busy" blocks.

What if I use Samsung Calendar instead of Google Calendar app?

Samsung Calendar reads from the same Google accounts the device knows about, so this setup works identically. Mirrored events appear in Samsung Calendar within the same refresh window.

Will this affect battery life?

No. SyncCal does the mirroring on its servers. Your phone just opens the calendar app normally; there's no extra background process or sync adapter on the device.

Can I exclude specific events from being mirrored?

Yes. SyncCal supports event-level exclusions based on source-side categories or labels. For example, exclude any Outlook event categorized "Private" from showing up on your personal Google.

Does this work with a Google Workspace (formerly G Suite) account?

Yes. Workspace accounts use the same Google Calendar API. The only difference is that Workspace admins can restrict third-party OAuth apps. If SyncCal's consent screen is blocked, ask your admin to allow it for the Calendar scope.