Privacy Policy

Last Updated: December 25, 2025

            🔒 Your Privacy Matters: Chronos is built with privacy at its core. All your calendar data stays on your device. We never collect, transmit, or store your personal information on our servers.
        

Overview

Chronos - Natural Calendar Assistant ("Chronos", "we", "us", or "our") is a Chrome extension that helps you create calendar events using natural language. This Privacy Policy explains how we handle your data.

Information We Do NOT Collect

We want to be crystal clear about what we DON'T do:

Calendar Events: We do not collect, store, or transmit your calendar event details
Personal Information: We do not collect names, email addresses, or personal data
Usage Analytics: We do not track how you use the extension
Browsing History: We do not access or record your browsing activity
Location Data: We do not collect location information

How Chronos Works

Chronos operates entirely on your local device:

Natural Language Processing: Your input is sent to OpenAI's GPT-4o-mini API to parse calendar events. This is processed in real-time and not stored by us.
Voice Transcription: If you use voice input, audio is sent to OpenAI's Whisper API for transcription. The audio is not stored by us.
Calendar Integration: Events are created directly in your Google Calendar or Outlook Calendar using their official APIs. We act as a bridge - data goes directly from your device to your calendar provider.
Local Storage: Your preferences (calendar selections) and draft events are stored locally in your browser using Chrome's storage API. This data never leaves your device.

Third-Party Services

Chronos uses the following third-party services:

OpenAI API

Purpose: Natural language processing and voice transcription
Data Sent: Your text input and voice recordings (if you use voice input)
OpenAI's Privacy Policy: https://openai.com/privacy
Data Retention: Per OpenAI's policy, API data may be retained for up to 30 days for abuse monitoring, then deleted

Google Calendar API

Purpose: Creating and managing calendar events
Data Access: We only access what you explicitly authorize (calendar events)
Google's Privacy Policy: https://policies.google.com/privacy
Permissions: You can revoke access anytime in your Google Account settings

Microsoft Outlook Calendar API

Purpose: Creating and managing calendar events
Data Access: We only access what you explicitly authorize (calendar events)
Microsoft's Privacy Policy: https://privacy.microsoft.com/privacystatement
Permissions: You can revoke access anytime in your Microsoft Account settings

Data Storage

The only data stored by Chronos is:

Local Browser Storage:
- Calendar provider preferences (Google/Outlook selection)
- Draft events (before you confirm them)
- Input text (so you can resume where you left off)
Stored Locally: All data is stored in your browser's local storage using Chrome's storage API
Not Synced: This data is not transmitted to our servers (we don't have any servers!)
You Control It: You can clear this data anytime by removing the extension

Permissions Explained

Chronos requests the following Chrome permissions:

storage: To save your preferences and draft events locally
identity: To authenticate with Google Calendar and Outlook
audioCapture: For voice input feature (only when you click the microphone button)
clipboardRead: For paste button feature (only when you click paste)
Host permissions: To communicate with Google Calendar, Outlook, and OpenAI APIs

Your Rights

You have the right to:

Revoke Access: Remove Chronos's access to your calendars anytime
Delete Data: Uninstall the extension to remove all local data
Control Permissions: Disable specific permissions in Chrome settings
Request Information: Contact us with questions about your data

Data Security

All API communications use HTTPS encryption
OAuth tokens are stored securely in Chrome's encrypted storage
We follow Chrome Web Store security best practices
No data is transmitted to third parties except the services mentioned above

Children's Privacy

Chronos is not directed to children under 13. We do not knowingly collect information from children under 13. If you are a parent or guardian and believe your child has used Chronos, please contact us.

Changes to This Policy

We may update this Privacy Policy from time to time. We will notify users of any material changes by updating the "Last Updated" date. Continued use of Chronos after changes indicates acceptance of the updated policy.

Open Source Commitment

Chronos is committed to transparency. Our code is available for review, allowing you to verify our privacy claims.