Last updated: April 9, 2026
If you choose to sign in, we collect your email address solely to authenticate your account and save your calculations. We use Supabase for authentication via magic link emails — no passwords are stored. If you use the calculator without signing in, we collect no personal information at all.
Your email address is used only to send you sign-in links and to associate your saved calculations with your account. Your calculation data (yeast strains, cell counts, volumes, etc.) is stored securely and is only accessible to you. We do not use your data for marketing, advertising, or any purpose other than providing this tool.
We do not sell, rent, or share your personal information with third parties. Your data stays between you and yeest.beer. The only third-party services involved are Supabase (database and authentication) and Vercel (hosting), both of which have their own privacy policies and security practices.
We do not use tracking cookies, analytics, or any third-party tracking scripts. The only cookies used are essential session cookies required for authentication if you choose to sign in.
When you purchase merchandise through our Yeest Jawns shop, you are redirected to our Shopify store. Shopify handles all payment processing and order fulfillment. Your purchase data is governed by Shopify's privacy policy. We do not have access to your payment information.
You can delete your saved calculations at any time from the calculator page. If you want your account and all associated data permanently deleted, contact us and we will remove everything. You can also simply stop using the site — we will never contact you unless you request a sign-in link.
If you have questions about this privacy policy or your data, reach out to us through our contact form.
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