Privacy Policy

Last Updated: August 21, 2026

Multi-Inbox Checker Pro ("we", "our", or "the extension") is dedicated to protecting your privacy. This policy outlines how user information is handled.

1. 100% Client-Side Architecture

Multi-Inbox Checker Pro runs strictly inside your local web browser (Google Chrome, Microsoft Edge, and Chromium-based browsers):

No Remote Databases: We do not operate or maintain any servers that store, process, or monitor your emails or passwords.
Direct API Communication: Network requests for email data travel directly between your device and Google's official API (gmail.googleapis.com) or Microsoft's official Graph API (graph.microsoft.com).

2. Data Collection & Usage

Email Addresses & Display Names: Stored locally in chrome.storage.local solely to label your connected inboxes.
OAuth Access Tokens: Retained locally on your device in chrome.storage.local to authenticate API requests.
Email Content & Snippets: Fetched on-demand and cached in your browser. You can clear this cache at any time via Settings → "Clear Local Cache".
Preferences: UI settings (theme, density, sounds, interval) are saved to chrome.storage.sync.

3. Google API Limited Use Disclosure

Multi-Inbox Checker Pro's use and transfer to any other app of information received from Google APIs adheres to the Google API Services User Data Policy, including the Limited Use requirements:

We do not transfer or disclose Google user data to third parties.
We do not use Google user data for serving personalized advertising or AI model training.
No human ever reads your emails or messages.

4. On-Device AI Processing

All AI email thread summaries are computed locally on your device via the browser's built-in Prompt API (Gemini Nano). No email content is transmitted to external cloud AI servers.

5. Data Deletion & Revocation

You can disconnect any account at any time from the side panel or Settings page. Disconnecting an account immediately wipes all associated tokens and cached emails from your machine.

6. Sponsorship & Zero Third-Party Tracking

Multi-Inbox Checker Pro is 100% tracker-free and does not use third-party advertising networks, profiling scripts, or tracking cookies. All sponsorships within the application and website are direct, non-tracking informational cards or voluntary support links (such as Buy Me a Coffee). We do not share any user data or telemetry with advertisers.

7. Contact

For questions or support, please contact the developer via our GitHub Repository.