Fantastical 4.1.15 Adds Calendar Mirroring

Flexibits:

Calendar Mirroring allows you to connect two separate calendars (like work and personal) so that events from one automatically show up on the other.

The best part? No event information is sent to Flexibits servers or saved outside of your device.

You can choose to show full event details or just block the time out as a mysterious, professional “Busy”. Your coworkers don’t need to know you’re getting a root canal, they just need to know you’re unavailable.

In Flexibits’s example scenario, the idea is that you have a personal calendar with important events that you want to mirror to your work calendar, to block the times for those events off — and you might just want them marked as “Busy” on your work calendar, rather than revealing the actual details.

I’ve been using this feature in beta for a few months and love it, even though my use case is seemingly simple. For recording episodes of Dithering, Ben Thompson and I have a shared Microsoft 365 calendar. (You can guess which of the two of us set that up by that fact.) Fantastical has long had terrific built-in support for Microsoft 365 accounts. So for me, those events have always just shown up in Fantastical. For me.

The problem is, my wife and I share an iCloud calendar, where we put events we want each other to know about. My Dithering recordings have never shown up there. Ben and I record on a pretty regular schedule, but it’s always been a minor irritation that my wife can’t see when I’m booked for Dithering. Fantastical’s new mirroring feature solves this perfectly. I set up a mirror to copy all events from my Dithering calendar to my family calendar, keeping the original event titles rather than obscuring them as “Busy”. (The titles all just say “Dithering”.)

The icing on the cake is Fantastical’s longstanding “Combine identical events” preference setting. Because I have that setting on, I don’t see duplicate “Dithering” events — one from my Dithering calendar, and another from my family calendar. I just see one event for each scheduled recording, with a striped dual-color swatch that indicates that this one event exists on both calendars. It’s just perfect.

One more thing: Also somewhat recently, Fantastical added support for Anthropic’s MCP to integrate your calendaring with Claude Desktop. David Sparks made a short demo video that shows it off. I don’t really use Claude so this didn’t hit for me personally, but it seems cool enough that it made me at least consider, for a moment, switching from ChatGPT to Claude. Then I remembered what the Claude app is like.

★ Saturday, 4 July 2026