Privacy Policy

Last updated 23 September 2026

Meridian is a calendar application for macOS developed by Maximilian Ralser. This policy explains what data the app handles and where it goes. The short version: everything stays on your Mac, and the developer never receives your data.

No servers, no accounts with us

Meridian has no backend. The app talks directly from your Mac to the calendar and meeting services you connect (Apple iCloud, Google Calendar, Microsoft 365, Microsoft Teams, Zoom, or any CalDAV server). There is no Meridian account, no sign-up, and no data passes through infrastructure operated by the developer.

Data the app accesses

• Calendar data. Meridian reads your calendars and events and, when you create or edit an event, writes those changes back to the service you chose. A copy of your events is cached in a local database on your Mac so the app works offline and starts quickly.
• Account identity. When you sign in with Google, Microsoft or Zoom, the app reads your email address to label the account in its settings.
• Online meetings. If you connect Microsoft Teams or Zoom and choose it for an event, Meridian creates a meeting in that account with the event's title and time, and adds the meeting link to the event. It does not read your existing meetings.
• Sign-in credentials. OAuth refresh tokens, app-specific passwords, and CalDAV passwords are stored in the macOS Keychain on your Mac and are never transmitted anywhere other than to the service they belong to.
• Weather location. If you enable the optional weather feature, the place name you enter is sent to Open-Meteo to fetch a forecast. Open-Meteo's handling of that request is described in its own terms. No other location data is collected.

Google user data

Meridian uses the Google Calendar API to read and write events in the Google Calendar accounts you connect. Its use of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements. In particular, Google user data is used only to display and edit your calendars inside the app, is never sold, never used for advertising, and never transferred to third parties or to the developer.

What we do not do

• No analytics, telemetry, or crash reporting is sent to the developer or anyone else.
• No advertising and no tracking.
• No sharing or selling of data.

Zoom sign-in page

Zoom only returns sign-ins to a web address, so it sends them to a page on this site that immediately passes the result to Meridian on your Mac. The page stores nothing. The one-time sign-in code it forwards cannot be used without a secret that never leaves your Mac.

Removing your data

Removing an account in Meridian's settings deletes its cached events and its credentials from the Keychain. To revoke Meridian's access to your Google account, visit myaccount.google.com/permissions. For Microsoft accounts, use account.live.com/consent/Manage or, for work accounts, myapps.microsoft.com. For Zoom, remove Meridian under Added Apps in the Zoom App Marketplace. Deleting the app removes all remaining local data.

Changes

If this policy changes, the updated version is published on this page with a new date.

Contact

Maximilian Ralser, maximilian@ralser.email