Privacy Policy

Last updated: August 25, 2025

1. Introduction

xCost ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our browser extension and services.

2. Information We Collect

2.1 Personal Information

We may collect personal information that you voluntarily provide to us when you:

  • Register for an account
  • Use our browser extension
  • Contact us for support
  • Subscribe to our newsletter

2.2 Usage Data

We automatically collect certain information when you use our extension, including:

  • Product search queries and browsing patterns
  • Cost analysis requests
  • Extension usage statistics
  • Device and browser information

Dietary Extension Note: For the dietary risk detection experience on migros.ch we do not transmit or collect the nutrition facts, ingredient lists, product content, or any health-related inferences. All parsing and risk scoring happens locally in your browser and is not sent to our servers.

2.3 Cookies and Tracking Technologies

We use cookies and similar tracking technologies to enhance your experience and analyze usage patterns. You can control cookie settings through your browser preferences.

3. How We Use Your Information

We use the information we collect to:

  • Provide and improve our cost analysis services
  • Personalize your experience
  • Send you relevant product recommendations
  • Communicate with you about updates and offers
  • Analyze usage patterns to improve our services
  • Detect and prevent fraud or abuse

4. Information Sharing and Disclosure

We do not sell, trade, or rent your personal information to third parties. We may share your information in the following circumstances:

  • With your explicit consent
  • To comply with legal obligations
  • To protect our rights and prevent fraud
  • With service providers who assist in our operations

5. Data Security

We implement appropriate technical and organizational measures to protect your personal information against unauthorized access, alteration, disclosure, or destruction. However, no method of transmission over the internet is 100% secure.

6. Your Privacy Rights

You have the right to:

  • Access your personal information
  • Correct inaccurate data
  • Delete your personal information
  • Restrict processing of your data
  • Data portability
  • Opt-out of marketing communications

7. Children's Privacy

Our services are not intended for children under 13 years of age. We do not knowingly collect personal information from children under 13.

8. International Data Transfers

Your information may be transferred to and processed in countries other than your own. We ensure appropriate safeguards are in place for such transfers.

9. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. We will notify you of any material changes by posting the new Privacy Policy on this page and updating the "Last updated" date.

10. Contact Us

If you have any questions about this Privacy Policy, please contact us at:

11. Dietary Risk Detection Extension (Migros.ch)

This section describes additional privacy practices for our upcoming dietary risk detection functionality available on migros.ch product pages.

11.1 Local-Only Processing

The dietary module analyzes publicly available product page content (e.g., nutrition tables, ingredient lists, category tags) directly inside your browser. The raw content, extracted features, intermediate scores, and risk labels never leave your device and are not stored on our servers.

11.2 No Health or Medical Data Collection

We do not collect, create, or maintain a profile of your personal health status, medical conditions, dietary restrictions, or consumption history. The module performs a one‑time, ephemeral assessment of the currently viewed product only.

11.3 On-Device Intelligence (Gemini Nano)

Where supported by your browser environment, lightweight language understanding and classification may leverage an on‑device model (e.g., Gemini Nano) exposed by the browser. No product text or user data is sent to remote large language model endpoints for this feature.

11.4 Data We Do Not Store

  • No nutrition facts or ingredient lists
  • No risk scores or flags
  • No per‑user dietary preferences or history
  • No linkage of grocery products to your account identity

11.5 Transparency & Controls

You may disable or remove the dietary module at any time by disabling the related extension feature. Because no server-side storage occurs, uninstalling the extension removes all functionality and any ephemeral in-memory state.

11.6 Not Medical Advice

The dietary risk indicators are heuristic wellness signals to support informed grocery choices and are not a substitute for professional medical or nutritional advice.