Last Updated: February 23, 2026
This Privacy Policy describes how Emerald Nutrition (the "Extension"), developed by CartWatch, collects, uses, and protects information when you use our Chrome extension. We are committed to transparency and protecting your privacy.
Extension Name: Emerald Nutrition
Developer: CartWatch
Website: https://app.cartwatch.info
Contact: [email protected]
Emerald Nutrition is a Chrome extension designed to provide nutritional information and product insights when you browse supported online retailers. The Extension only operates on specific retailer websites you visit and does not track your general browsing activity.
The Extension only activates and collects data when you visit the following retailer websites:
The Extension does not track or collect information from any other websites you visit.
When you visit a product page on one of the supported retailer websites, the Extension automatically extracts the following information:
This information is used solely to provide you with nutritional data and product insights for the item you are viewing.
If you choose to create an account with CartWatch:
Account creation is optional. The Extension provides core functionality without requiring an account.
The Extension stores your preferences locally in your browser, including:
This data is stored using Chrome's local storage and sync storage APIs and remains on your device.
The Extension uses cookies for the following purposes:
These cookies are essential for the Extension's functionality when you are logged in.
We use the collected information for the following purposes:
We do not:
The Extension communicates with the following third-party services to provide its functionality:
Service: app.cartwatch.info
Purpose: Fetches nutritional information and product data for products you view
Data Shared: Product identifiers (UPC, product ID), authentication tokens (if logged in)
Service: world.openfoodfacts.org
Purpose: Provides additional nutritional data for food products
Data Shared: Product UPC/barcode
Privacy Policy: https://world.openfoodfacts.org/privacy
Service: api.upcitemdb.com
Purpose: Product barcode lookup service
Data Shared: Product UPC/barcode
Service: docs.google.com/forms
Purpose: User feedback collection
Data Shared: Any information you voluntarily provide in feedback forms
Privacy Policy: https://policies.google.com/privacy
Most of your data is stored locally on your device using Chrome's storage APIs. This includes:
This data remains on your device and is not automatically transmitted to our servers.
If you create an account, the following information is stored on CartWatch servers:
We implement reasonable security measures to protect your data, including encryption in transit (HTTPS) and secure authentication mechanisms.
Local data is retained until you uninstall the Extension or clear your browser data. Server-side account data is retained until you request account deletion.
You can view and update your account information by logging into your CartWatch account at https://app.cartwatch.info.
You can request deletion of your account and associated data by contacting us at [email protected]. Local data can be cleared by uninstalling the Extension or using your browser's data clearing tools.
You can stop all data collection by simply uninstalling the Extension from your browser. Account creation and login are entirely optional.
You can manage cookies through your browser settings. Note that disabling cookies may affect the Extension's functionality, particularly authentication features.
The Extension is not intended for use by children under the age of 13. We do not knowingly collect personal information from children under 13. If you believe we have collected information from a child under 13, please contact us immediately.
We may update this Privacy Policy from time to time to reflect changes in our practices or legal requirements. We will notify users of any material changes by updating the "Last Updated" date at the top of this policy. Continued use of the Extension after changes constitutes acceptance of the updated policy.
If you have any questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us:
Email: [email protected]
Website: https://app.cartwatch.info
We will respond to your inquiry within a reasonable timeframe.
By installing and using the Emerald Nutrition Extension, you consent to the collection and use of information as described in this Privacy Policy.