Privacy Policy

Overview

QuitCurve ("we", "our") helps you quit vaping through personalized step-down plans. We are committed to protecting your privacy. This policy explains what data we collect and how we use it.

What we collect

• Account info: email address and first name (if you create an account)
• Quit plan data: device type, usage frequency, nicotine level, weekly spend, and plan pace
• Progress data: craving logs, daily check-ins, and plan statistics
• Guest mode: if you skip account creation, data is stored only in your browser (localStorage)

How we use your data

We use your data solely to provide and improve the QuitCurve service: calculating your personalized reduction curve, tracking progress, and syncing across devices when you sign in. We do not sell your personal data to third parties.

Data storage

When you create an account, your data is stored securely via Supabase (hosted PostgreSQL with encryption in transit and at rest). Guest-mode data remains on your device only and is not transmitted to our servers.

Third-party services

• Supabase — authentication and database (see supabase.com/privacy)
• Vercel — app hosting (see vercel.com/legal/privacy-policy)

Medical disclaimer

QuitCurve is a behaviour-change support tool. It does not provide medical advice, diagnosis, or treatment. Always consult a healthcare professional before making changes to nicotine use, especially if you have underlying health conditions.

Your rights

You may request access to, correction of, or deletion of your data at any time by contacting us at privacy@quitcurve.app.

Changes to this policy

We may update this policy from time to time. Continued use of QuitCurve after changes constitutes acceptance of the updated policy.

Contact

Questions? Email hello@quitcurve.app