Privacy policy
Effective September 2026.
What we collect
Account data. Your email address and a hashed password, stored by our auth provider (Supabase). Billing data. Handled by Stripe; we store your Stripe customer id and subscription status, never your card number. Usage data. The count of trial solves you've used and the time of your last successful license check. Support data. Messages you send us.
What we don't collect
Your cards. Solves run locally on your machine — hands, boards, and results are never uploaded to our servers. We run no advertising trackers and sell no data.
How we use data
To authenticate you, enforce plan limits, process payments, answer support requests, and send service emails (receipts, trial and subscription notices). We do not send marketing email without your consent.
Processors
Supabase (authentication and database) and Stripe (payments) process data on our behalf under their own privacy terms. Both are SOC 2 compliant.
Retention and deletion
Account data is kept while your account exists. You may request deletion at any time via support; we delete account and usage data within 30 days, except records we must keep for tax or legal reasons (e.g. Stripe invoices).
Security
Passwords are hashed by Supabase Auth and never stored in plain text. The desktop app stores session tokens in your operating system's credential manager, not on disk in plain text. All traffic uses TLS.
Your rights
You may request access, correction, export, or deletion of your personal data by contacting support. If you are in the EEA/UK, you also have the right to lodge a complaint with your supervisory authority.
Contact
Privacy questions: contact support.