Privacy policy
Updated 3 November 2026
1. Controller
Mathias Gort, MSc, Relay Studio, Badidastraße 81, 6811 Göfis, Austria. Contact: support@relaystudio.org.
2. Figures you enter
The calculation runs in your browser. Income, payments, client names and every other figure you enter are not sent to us or to anyone else.
Clients you save are stored in your browser's local storage on this device and are deleted when you remove them or clear the site's data. A backup file you download stays on your device.
To apply your plan's limit, the page asks the server which plan you are on. This request carries your sign-in cookie, or none if you are not signed in, and no tax figures.
3. Account
For an account we store your email address, your plan and subscription status for each Relay Studio tool, and whether you want product news by email (consent, Art. 6(1)(a) GDPR, revocable at any time). One account works on every Relay Studio tool. You sign in with your email address and a password; only a hash of the password is stored. The database and sign-in are run by Supabase Inc. as processor, with data held in the EU (Frankfurt).
We delete the account and its usage records within 7 days of a request to support@relaystudio.org.
4. Payments
Payments are handled by Stripe Payments Europe, Ltd., 1 Grand Canal Street Lower, Dublin 2, Ireland. We do not receive card details; we see name, email, country, plan and invoices. Invoice records are kept for 7 years (§ 132 BAO).
5. Hosting and server logs
The site runs on Vercel Inc., 440 N Barranca Ave #4133, Covina, CA 91723, USA, with functions in the Frankfurt region. Vercel processes technical data on each request (IP address, time, URL, browser) to deliver and protect the site (Art. 6(1)(f) GDPR). Transfers to the US rely on the EU-US Data Privacy Framework and standard contractual clauses.
To measure reach we use Vercel Web Analytics. It sets no cookies and builds no profiles; we see only aggregated page views, referring pages, countries and device types, and visitors are not recognised across days (Art. 6(1)(f) GDPR).
6. Cookies and browser storage
Only cookies needed for sign-in are set. There are no advertising or tracking cookies.
Saved clients are kept in your browser's local storage under the key relay-tax-clients-v1, which only this site can read. They are needed for the function you use (§ 165 (3) TKG 2021).
7. Your rights
You have the right of access, rectification, erasure, restriction, portability and objection, and to withdraw consent. Write to support@relaystudio.org. You can complain to the Austrian Data Protection Authority (dsb.gv.at).