Privacy Policy

Billstac is an invoice management tool. We try to collect as little information as possible and to be transparent about what we store and why. This page explains it in plain language.

1. What data we collect

• Your account email address (for sign-in).
• An optional display name you choose during signup.
• Invoice data you enter or that we extract from emails you forward to your personal Billstac address: vendor / recipient name, amount, currency, IBAN, BIC, reference, due date, issue date, category, and an optional description.
• Any PDFs you upload as an invoice attachment, and the text of emails you forward in (so you can review the original later).
• Basic technical logs (errors, request timestamps) needed to keep the service working.

2. Why we process it

Solely to provide the Billstac service: storing your invoices, reminding you about due dates, and generating SEPA payment QR codes. We do not use your data for advertising or profiling.

3. Where it's stored

Your data is stored in our managed backend (Lovable Cloud, powered by Supabase) inside the EU. Access is locked down with row-level security so that only you can read or write your invoices, your profile, and your support conversations.

4. Third parties we rely on

• Lovable Cloud / Cloudflare — hosting and database.
• Postmark — receives the emails you forward to your personal Billstac inbox so we can turn them into invoices. We do not send marketing or transactional email through it.
• Lovable AI Gateway — extracts the structured fields (amount, IBAN, due date, …) from the invoices you forward. The AI provider does not use your content to train its models.
• Google — only if you choose "Sign in with Google", in which case Google verifies your email for us.

5. What we do NOT do

• We never sell your data.
• We never send you marketing emails.
• We do not run advertising or behavioural tracking.
• We do not embed third-party analytics or ad SDKs.

6. Your rights

You can access, correct, export and delete your data at any time. The fastest way is to open Settings → Delete account, which permanently removes your account and every invoice attached to it. For anything else, email us at .

7. Contact

Questions about this policy? Reach us at .