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Calendar 366 v4.0
Your events and tasks, now ready for iPhone Duo
Calendar 366 brings events and tasks together in one native app for iPhone, iPhone Duo, iPad, Apple Watch and Mac. It works with iCloud, Google, Outlook & Microsoft 365, CalDAV and Todoist. What makes it different: 13 views, Calendar Sets, natural language input, Siri AI and MCP support for Claude and LM Studio. On the Mac it also lives in the menu bar. New in 4.0: iPhone Duo support, redesigned event and task details, new app icons and more reliable invitations.
Hi Product Hunt,
I'm Vincent, and I've been building Calendar 366 on my own since 2017. Version 4.0 is the biggest update in a long time.
What's new:
- iPhone Duo support. The layout adapts to the fold, the camera strip and the rounded corners. Unfolded, your calendar is on the left and your tasks are on the right.
- Redesigned event and task details. The preview is cleaner and lets you edit directly, and the edit view is tidier.
- New app icons to choose from.
- More reliable invitations. You can reply to a single occurrence or the whole series, and delegate on Microsoft and Google accounts.
- Weather for the event's own location right in the preview.
Many of these changes came straight from user feedback, so thank you to everyone who wrote in.
I'd love to hear what you think, and what you'd like to see next.
Vincent
About Calendar 366 v4.0 on Product Hunt
“Your events and tasks, now ready for iPhone Duo”
Calendar 366 v4.0 was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #321 on the daily leaderboard. Calendar 366 brings events and tasks together in one native app for iPhone, iPhone Duo, iPad, Apple Watch and Mac. It works with iCloud, Google, Outlook & Microsoft 365, CalDAV and Todoist. What makes it different: 13 views, Calendar Sets, natural language input, Siri AI and MCP support for Claude and LM Studio. On the Mac it also lives in the menu bar. New in 4.0: iPhone Duo support, redesigned event and task details, new app icons and more reliable invitations.
On the analytics side, Calendar 366 v4.0 competes within iOS, Productivity and Calendar — topics that collectively have 807k followers on Product Hunt. The dashboard above tracks how Calendar 366 v4.0 performed against the three products that launched closest to it on the same day.
Who hunted Calendar 366 v4.0?
Calendar 366 v4.0 was hunted by Vincent Miethe. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
For a complete overview of Calendar 366 v4.0 including community comment highlights and product details, visit the product overview.
Vincent Miethe