Privacy Policy
Effective May 28, 2026
This Privacy Policy explains what information CartSignal collects, how we use it, and your choices. By using CartSignal you agree to this policy.
1. Information We Collect
Account information — When you register, we collect your email address, display name, home ZIP code, and home state.
Price submissions — When you submit a price, we record the store, product, reported price, and date observed. Submissions are associated with your account for contributor tier and activity tracking.
Usage data — We track basic account activity such as your submission count and contributor tier level.
2. How We Use Your Information
We use the information we collect to:
- Authenticate and manage your account
- Display relevant local grocery prices to you and other users
- Calculate your contributor tier based on submission activity
- Send account-related emails such as email confirmation, password reset, and service notices
We do not use your information for advertising or sell it to third parties.
3. Information Visible to Other Users
Price submissions — including the store, product, price, and date reported — are visible to all CartSignal users. Submissions are not publicly linked to your email address or full name. Your display name is used only within your account and is not shown on price listings.
4. Third-Party Service Providers
CartSignal relies on the following third-party services to operate:
- Supabase (supabase.com) — database storage and user authentication
- Resend (resend.com) — transactional email delivery
These providers process your data solely to deliver CartSignal's service and are governed by their own privacy policies.
5. Data Retention
We retain your account information and price submissions until you delete your account. Upon account deletion, your personal information is removed; past price submissions are anonymized and may remain in the database as community data.
6. Your Rights and Choices
You may access, update, or request deletion of your personal information at any time by managing your account on the Profile page or by contacting us at support@shoppingcartsignal.com. Note that certain emails — such as password reset and email confirmation — are essential to account security and cannot be disabled.
7. Security
Passwords are hashed by Supabase Auth and never stored in plain text. All data is transmitted over HTTPS. While we take reasonable steps to protect your information, no system is completely secure and we cannot guarantee absolute security.
8. Children's Privacy
CartSignal is not directed to children under 13 and we do not knowingly collect personal information from children under 13. If you believe we have inadvertently done so, please contact us and we will delete the information promptly.
9. Changes to This Policy
We may update this Privacy Policy as CartSignal evolves. Changes will be posted on this page with an updated effective date. Continued use of CartSignal after changes are posted constitutes your acceptance of the revised policy.
10. Contact Us
Privacy questions or data requests? Email us at support@shoppingcartsignal.com.