Privacy Policy

Last updated: April 2026

Grind Patterns collects minimal data necessary to provide the service.

Data We Collect

When you create an account, we store your email address and authentication credentials (managed by Supabase). We also store your review history, progress data, and account status.

How We Use Data

Your data is used solely to provide the spaced repetition service, track your learning progress, and manage your account. We do not sell your data to third parties.

Analytics

We use Vercel Analytics to understand usage patterns and improve the product. This data is anonymized and does not include personally identifiable information.

Payment Processing

Payments are processed by Stripe. We do not store credit card information. Please refer to Stripe's privacy policy for details on their data handling.

Data Deletion

You can request deletion of your account and all associated data by contacting us. We will process deletion requests within 30 days.