Tamer Designs

CalendarBell Privacy Policy

Last updated 2 September 2026

CalendarBell is a desktop application that shows reminders for your Google Calendar events on your own computer. It has no servers. Your calendar data is read directly from Google by the application running on your machine, used only to show you a reminder, and never sent anywhere else.

What the application accesses

CalendarBell requests a single Google OAuth scope, https://www.googleapis.com/auth/calendar.readonly. This grants read-only access. The application cannot create, modify or delete anything in your calendar.

Using that access, it reads:

• the list of calendars on the Google accounts you choose to connect;
• for upcoming events only, the title, start and end time, location, description, meeting link, reminder settings, and your own attendance response.

Where that data goes

• It stays on your computer. Event details are held in memory to schedule reminders. They are not uploaded, and there is no database or server holding them.
• There are no third parties. The application communicates only with Google's own API endpoints, over HTTPS with certificate verification. There is no backend service, no analytics, no crash reporting, no advertising and no update telemetry.
• Nothing is sold or shared. No one receives your data other than you.

Credentials

The OAuth refresh token that lets CalendarBell reconnect to Google is stored on your computer, encrypted with the Windows Data Protection API (CryptProtectData, CurrentUser scope) together with an application-specific entropy value. Only your Windows user account, on that machine, can decrypt it. It is transmitted only to Google, and only to refresh access. Copying the file to another computer yields nothing usable.

Files stored on your machine

All application state lives in a single folder, %APPDATA%\CalendarBell: your settings, the encrypted credential file, a record of which reminders have already been shown, and a local log of sync activity and errors. All of it stays on your computer.

Removing your data

• Run calendarbell logout <account> to revoke the token with Google and delete it locally.
• Delete the %APPDATA%\CalendarBell folder to remove all remaining local state.
• Revoke access at any time at Google Account permissions.

Because nothing is retained anywhere but your own computer, these steps remove your data completely.

Children

CalendarBell is a general-purpose utility and is not directed at children under 13.

Changes to this policy

If this policy changes, the revision date above will be updated.

Contact

Questions about this policy: colton@tamerdesigns.com