Privacy Policy

Last updated: March 7, 2026

SubWatch ("the Extension") is a browser extension that helps you track and manage subscription costs. This privacy policy explains what data is collected and how it is used.

Data Collection

Data Stored Locally

The following data is stored in your browser's local storage (chrome.storage.local) and never leaves your device:

Subscription data — Name, amount, billing cycle, category, and next renewal date for each subscription you add
License state — Whether a Pro license is active (boolean flag)
License key — Your Polar license key (if activated)
Activation ID — Your Polar activation identifier (if activated)

Anonymous Analytics (Google Analytics 4)

The Extension sends anonymous usage events via the GA4 Measurement Protocol:

extension_installed — sent once on first install
extension_updated — sent on extension update
subscription_added — sent when a subscription is added (category name only; no subscription name or amount is included)
subscription_deleted — sent when a subscription is deleted (category name only)
dashboard_viewed — sent when the dashboard is opened (subscription count only)
weekly_active — sent once per week to measure active usage

      No personally identifiable information (PII) is included. Events contain only a randomly generated client ID, the event name, and minimal parameters as described above.
    

License Validation (Polar)

When a license key is entered, the Extension communicates with the Polar API (api.polar.sh) to:

Validate the license key status
Activate or deactivate the license

Only the license key and organization ID are sent. No subscription data or personal information is transmitted.

Data NOT Collected

The Extension does not collect:

Browsing history or visited URLs
Subscription names, amounts, or financial details
Personal information (name, email, etc.)
Cookies or tracking identifiers
Screenshots or page content

Notifications

Pro users receive Chrome notifications 2 days before a subscription renews. Notifications are generated locally based on your stored subscription data and do not involve any external service.

Data Retention

Local storage data persists until you uninstall the Extension or clear browser data
Analytics events are retained according to Google Analytics' standard retention policy
License data is managed by Polar according to their privacy policy

Third-Party Services

Service	Purpose	Privacy Policy
Google Analytics 4	Anonymous usage analytics	policies.google.com/privacy
Polar	License key management	polar.sh/legal/privacy

Changes to This Policy

We may update this privacy policy from time to time. Changes will be posted with an updated "Last updated" date.

Contact

If you have questions about this privacy policy, contact us at [email protected].