How to Set Up Calendar Sync with SyncThemCalendars

SyncThemCalendars connects Google, Outlook, and Apple iCloud calendars and copies events between them automatically. Setup takes about two minutes, requires no software installation, and starts with a 14-day free trial that the site says needs no credit card. You can sync one-way or two-way, and you can hide event details behind a "Busy" block if you don't want the other calendar to see titles, descriptions, or locations.

What you need before starting

• Accounts for the calendars you want to sync (Google, Outlook, or iCloud).
• Access to authorize SyncThemCalendars to read and copy events from those calendars.
• A decision on direction: one-way (copy from a source to a target) or two-way (mirror events both ways).
• A decision on privacy: show full event details or replace them with a "Busy" block.

Step-by-step setup

1. Connect your calendars

Sign in and connect each calendar account you want involved — Google, Outlook, or iCloud. The service copies free/busy times across your calendars in real time once a sync is created.

2. Create a sync

Choose a source calendar and a target calendar. This defines where events are copied from and where they land.

3. Set the sync direction

Pick one-way if you only want events copied from the source to the target. Pick two-way if you want the calendars to mirror each other. The site describes this as entirely up to you.

4. Configure privacy (optional)

If you don't want the target calendar to reveal event details, hide any field — title, description, location, and more — behind a simple "Busy" block. This keeps the time slot occupied without exposing what the event is.

5. Finish

That's the whole setup. The site describes it as "set-and-forget": after you connect and create the sync, SyncThemCalendars handles copying every upcoming event for you.

What you get after setup

Common snags to plan around

• Direction mistakes. If events appear in one calendar but not the other, check whether you created a one-way sync when you wanted two-way.
• Hidden details. If the target calendar shows "Busy" instead of event titles, that's the privacy setting working as configured — not a sync failure.
• Account coverage. The service supports Google, Outlook, and iCloud. Confirm all your calendars fall into those three before assuming a sync will work.

When this fits

SyncThemCalendars suits people juggling multiple calendars across providers who want automatic copying without an IT project. One user on the Google Workspace Marketplace described syncing Outlook to Google Calendar after a free method failed to show up on their phone — this worked on both desktop and phone. Another praised it for avoiding overbooking across a church schedule and two small businesses. A third used it to sync a shared webcal with a personal iCal after a full day of failed alternatives.

If you only need a single calendar and never cross providers, the setup overhead isn't worth it. If you manage two or more calendars on different platforms, the two-minute setup and unlimited-event syncing are the core reasons to try it.