Privacy Policy

Short version: we collect as little as we can get away with, we don’t sell any of it, and you can wipe your data whenever you want.

What we collect

• Your email— so we can send you a magic link to sign in.
• Your tank data— chemistry readings, dosing logs, and tank setup details, but only if you create an account and log them.
• Anonymous error reports via Sentry— so we can fix bugs before you hit them twice.
• Billing info via Stripe— Stripe handles payments. We never see your card details.

What we don’t do

• We don’t sell your data. Not to anyone, not for anything.
• We don’t run ad networks or third-party trackers.
• The free calculator works without an account. If you don’t sign in, no data leaves your browser.

Where it lives

Account data is stored on Supabase (in EU or US regions, depending on the project). Stripe stores your billing details on PCI-compliant infrastructure — the same standard your bank uses.

Your rights

You can delete your account from /account. That wipes your data from our database. For data exports or anything else, drop us a line.

Cookies

One session cookie to keep you signed in. That’s it — no banners, no tracking pixels.

Changes

If we materially change this policy, we’ll email account holders before it takes effect.

Questions

Anything privacy-related, contact us and we’ll get back to you.