Privacy Policy

CheaperSupermarkets is operated by Peter Sonneveld. You can contact us at info@cheapersupermarkets.com or via the contact form on the website.

We collect the following data:

• •Account data (only when you register): email address, first and last name, username. Stored in Supabase.
• •Location data: your location is used temporarily to find nearby supermarkets. We do not store your location.
• •Search history: the products you search for are stored in anonymised form to provide better product suggestions.
• •Shopping lists: when logged in, your lists and comparison results are stored so you can access them later.
• •Savings: your calculated savings are stored locally in your browser (localStorage) and, when logged in, also in our database.
• •Newsletter: when you subscribe we store your email address. You can unsubscribe at any time via the link in the newsletter.
• •Price alerts: when you set a price alert we store your email address and alert settings.
• •Error reports: in case of technical errors, Sentry may collect anonymised error information.

We use your data exclusively for:

• •Comparing supermarket prices and displaying results
• •Storing and syncing your shopping lists
• •Sending price alerts and the newsletter (only when you have opted in)
• •Improving product suggestions based on anonymised search data
• •Monitoring the technical functioning of the app (Sentry)

We process your data on the following legal bases (GDPR):

• •Performance of a contract: account management, lists, price alerts
• •Consent: newsletter, push notifications
• •Legitimate interest: anonymised search statistics, error logging

We never sell your data. We work with the following processors:

• •Supabase (auth, database) — GDPR-compliant, servers in the EU
• •Vercel (frontend hosting) — GDPR-compliant
• •Railway (backend hosting) — US-based, standard contractual clauses apply
• •Sentry (error monitoring) — anonymised error data
• •Resend (transactional emails) — for price alerts and confirmation emails

• •Account data: while your account is active + up to 30 days after deletion
• •Shopping lists and comparison results: until you delete them
• •Search history (anonymised): up to 12 months
• •Newsletter data: until you unsubscribe
• •Price alert data: until you remove the alert

Under the GDPR you have the following rights:

• •Access: you can request what data we hold about you
• •Rectification: you can have inaccurate data corrected
• •Erasure: you can delete your account and all associated data via your profile page
• •Objection: you can object to processing based on legitimate interest
• •Portability: you can download an export of your data via your profile page (Settings → Export my data)

For access, rectification, objection or other rights: contact us at info@cheapersupermarkets.com.

We use functional cookies for authentication (Supabase session cookies) and local storage (localStorage) for shopping history and settings. We do not place tracking or advertising cookies.

All connections are encrypted via HTTPS. Passwords are never stored — authentication uses email addresses and secure tokens (Supabase Auth). We apply HSTS, CSP and other security headers.

We may update this privacy policy from time to time. For material changes we will notify you via the app or by email. The most current version is always on this page.

Questions or complaints? Email info@cheapersupermarkets.com. You also have the right to lodge a complaint with the Dutch Data Protection Authority (autoriteitpersoonsgegevens.nl).