CalDAV/CardDAV - Any Calendar
Premium Local ProductivityCalendars and address books that never touch macOS.
Fastmail, Nextcloud, iCloud, or your own server: if it speaks CalDAV, your schedule joins Halo's calendar answers, briefings, and meeting prep, right next to what macOS already knows. CardDAV address books feed the people Halo can recognize and resolve.
One app password connects it, straight from this Mac to your server. Ask Halo to add an event and it can write to the connected calendar too, always after you confirm.
Premium
A paid capability, part of a Halo plan. The free Mac app stays fully featured on its own.
Capabilities
What Halo does with it
With a Halo plan
- Brings the account's events into calendar answers, briefings, and meeting prep
- Resolves names against the account's address books
- Creates events on the connected calendar, always confirming first
- Works with Fastmail, Nextcloud, iCloud, and any standard CalDAV server
How it connects
Built into your Mac.
- 01
Nothing to sign in to
Halo works with CalDAV/CardDAV - Any Calendar through the same built-in macOS capabilities Apple's own apps use. There's no account to connect and no key to store.
- 02
macOS asks first
The first time Halo needs access, macOS shows its own permission prompt. You decide, and you can revoke it any time in System Settings.
- 03
Nothing leaves your Mac
Reading, writing, and understanding all happen on your device. There is no server involved, not even ours.
What stays private
Your app password is stored in the macOS Keychain and never leaves this Mac. Halo talks to your server directly: no Halo relay, and nothing about your schedule or contacts is uploaded. Disconnect any time and the stored password is removed.