Now on the Mac App Store · macOS 15 or later
Keep your calendars in sync on your Mac
Copy a calendar into another one: Outlook into iCloud, Google into Exchange, any mix. The copies sync to your phone and show up in whatever calendar app you use. Share the details, or just a busy block.
$10 once. Covers up to three Macs. You'll get your license key as soon as you've paid.
Already bought it? Download Syncom.
Show when you're busy, not what you're doing
Every sync has its own privacy level. Work can see you're at the dentist without knowing it's the dentist. Your family can see you're in meetings without seeing what they're about.
Full details
Title, location, notes and times
Title & time only
No location or notes
Busy block
Just the time, under a title you choose
One calendar, on every device
Some calendars only live on your Mac, like a work account behind a VPN. Syncom copies it into a calendar that already syncs, like iCloud or Google, and that calendar takes it everywhere else.
- From any calendar on your Mac
- Exchange & Outlook
- iCloud
- CalDAV
- On My Mac
- Into one that syncs
Syncom copies each event into iCloud, Google or Exchange, and keeps the copy up to date.
- And on to everything else
- iPhone
- iPad
- Apple Watch
- Other computers
- The web
Use the calendar app you like
Your work lives in Outlook and your family uses Google? The copies are ordinary events, so they show up in any app that shows that calendar, on any device.
- Apple Calendar
- Outlook
- Google Calendar
- Fantastical
- BusyCal
Your calendars, finally talking
Calendar providers only share with their own kind, and work accounts often can't share at all. Your Mac can see every calendar, so Syncom copies events between them right there.
| Option | What you get | Where it works |
|---|---|---|
| Sharing a calendar | What you get: Full details, or free/busy | Where it works: Inside one provider, if your admin allows it |
| Subscribing to a link | What you get: A read-only feed that refreshes when the provider gets to it | Where it works: Only where the calendar can be published |
| Syncom | What you get: Real events in your calendar, with the detail you choose | Where it works: Any calendars on your Mac, including Exchange behind a VPN |
One way or both
Sync A to B, B to A, or both ways, and give each direction its own rules. In a two-way sync, edits to a full-detail copy go back to the original.
As many syncs as you like
Send work to both personal and family, or merge several calendars into one. Pause any sync with a switch without losing its settings.
Syncs the moment something changes
No waiting on a timer. Syncom runs when any calendar changes, when your Mac wakes and when your VPN connects, with a safety-net sync every 5 minutes to 2 hours.
Recurring events that work
Weekly stand-ups and monthly reviews copy correctly. Move or cancel one meeting in a series, and only that copy changes.
Keep things out with #nosync
Tag an event #nosync, or a tag of your own, and it stays put. You can also skip events marked Free, and all-day events like holidays and birthdays.
Stays on your Mac
Syncom is a native Mac app built on Apple's own calendar framework. No account, no servers, no telemetry. Your events never pass through us.
And the small things
- Edits and deletions carry over to the copies
- Copies keep the original's alerts, or get one of your choosing
- Create a calendar for the copies without leaving Syncom
- Choose how far back and ahead each sync looks
- Changing a sync's rules updates the copies it already made
- Warnings about duplicate or opposing syncs
- Duplicate a sync to set up a similar one
- Remove a sync with its copies, or keep them
- Sync one or all of them on demand from the menu bar
- Launches at login
- Email support, with an optional debug log, from Settings
- Clean uninstall from Settings
Built not to wreck your calendar
Sync tools have a reputation for duplicates and vanished meetings. Syncom is careful with your data by design.
Your originals are left alone
A one-way sync never edits or deletes an original. Only its own copies change.
No runaway loops
A copy is never copied again, even when several syncs share calendars.
No wipe-outs
If a calendar comes back empty, say while an account is offline, Syncom skips that sync instead of deleting your copies.
Careful two-way syncs
They only change originals you own and can edit, never a meeting someone else organized, and never delete more than 3 in one run.
What it looks like
How it works
Syncom lives in the menu bar. There's no Dock icon, and nothing to open once it's set up.
- 1
Add your accounts to your Mac
Syncom can use any calendar that shows up in Apple Calendar. Add a work Exchange account in System Settings → Internet Accounts.
- 2
Add a sync
From the menu bar, pick two calendars and choose which way events should go.
- 3
Choose what copies show
Start from a preset: full mirror, title and time only, or busy blocks only. Then leave it running.
Syncom syncs while your Mac is on and you're logged in. Using the new Outlook for Mac? It keeps its calendars in its own store, which other apps can't read, so add the account in Internet Accounts too.
Questions
- Is this OK with my company's IT policy?
Syncom only copies what's already on your Mac and never sends your data to a server. But company policies vary, so check yours before copying work details to a personal calendar. Busy-block mode shares only times.
- Does Syncom send my calendars anywhere?
No. Syncom is a native Mac app with no account, no servers and no telemetry. It copies events between the calendars on your Mac, and your events never pass through us.
- Which calendars does it work with?
Any calendar the Calendar app on your Mac can see: Exchange and Outlook, iCloud, Google, CalDAV and On My Mac. It needs macOS 15 or later.
- Is there an iPhone or iPad app?
No, Syncom is Mac-only. Copies reach your other devices through the calendar account they live in, such as iCloud.
- How much does it cost?
$10, once, from our website. One license covers up to three Macs. It's also on the Mac App Store.
More answers are on the support page.
Get in touch
Questions, feedback or a bug? Tell us about your calendars and we'll get back to you. Answers to common questions are on the support page.
Or email hello@athlonaut.com.