Opus Numerology

Privacy Policy

Effective from 17 August 2026. Version: 1.0 — Opus Calculator

This notice has been prepared in accordance with Regulation (EU) 2016/679 of the European Parliament and of the Council (GDPR) and Act CXII of 2011 on the Right of Informational Self-Determination and on Freedom of Information, and applies solely to the free Opus Calculator application.

1. The data controller

Name: Mátyási Renátó Gergő, sole trader (Opus Numerology Services)
Registered office: 1133 Budapest, Hegedűs Gyula utca 89/B, Hungary
Tax number: 90415685-1-41
Registration number: 59605322
E-mail: info@opusnumerology.com
Website: opusnumerology.com

The data controller is not required to appoint a data protection officer and therefore has not appointed one.

2. The essentials in brief

Opus Calculator does not collect or transmit any personal data. The entire calculation runs in your own browser, in JavaScript. The name and date of birth you enter never leave your device: they are not sent to the data controller or to any third party. There is no registration, no user account, no payment, and no transfer of data to any artificial intelligence service.

3. What data we process, for what purpose and on what legal basis

In connection with your use of the application, the data controller does not carry out any processing of personal data. The data you enter is processed and stored exclusively in your own browser:

DataWhere it is storedPurposeRetention
Full birth name, date of birth Only in your browser's local storage (localStorage) — never sent to a server So the application can calculate the numbers, and so you don't have to type them again next time Until you clear your browser's stored data
The selected view and your answer on the pronunciation of the letter "Y" Only in your browser's local storage Remembering the state of the application Until you clear your browser's stored data
Technical log data relating to visiting the website (e.g. IP address), held by the hosting provider On the hosting provider's server Operating the site, operational security In line with the hosting provider's practice

Since the name and date of birth never reach the data controller, no processing takes place in respect of them. You can delete the data held in your browser's local storage at any time through your browser settings ("clear browsing data"), or by clearing the fields in the application.

We do not process special categories of data. A birth name and a date of birth do not in themselves qualify as special category data under Article 9 GDPR.

4. Processors and recipients

The operation of the application requires no data processor, because it transmits no data. To make the website available, the data controller uses a hosting provider:

ProcessorActivityData concerned
Rackhost Zrt.
6000 Kecskemét, Sosztakovics u. 3. II/6., Hungary
Hosting servicesTechnical data relating to the operation of the website

5. Transfers to third countries

No data transfer to a third country takes place when you use the application, because the data you enter never leaves your device.

6. Automated decision-making

The application performs mathematical calculations in your browser, without the involvement of artificial intelligence. No automated decision-making within the meaning of Article 22 GDPR takes place; the content displayed is for informational and educational purposes only.

7. Cookies and local storage

The application does not use cookies — neither for marketing nor for analytics. For its operation it uses only the browser's local storage (localStorage), in which it saves the name, date of birth and selected settings you entered, so that you don't have to enter them again next time. This data stays in your browser and requires no separate consent.

8. Data security

The website is served over an encrypted connection (HTTPS). Since the application neither transmits nor stores personal data on a server, there is no risk of server-side data loss or unauthorised access in respect of the data you enter.

9. Your rights as a data subject

You are entitled at any time to:

You can send your request to info@opusnumerology.com. The data controller will fulfil the request within one month at the latest, or will inform you in justified cases of an extension of that deadline. Please note that the data controller has no knowledge of, and does not store, the data you enter into the application, so you can delete it yourself in your own browser.

10. Remedies

If you believe that your rights have been infringed in the course of the processing of your data, please first contact the data controller directly. You may also lodge a complaint with the supervisory authority or bring an action before a court.

Hungarian National Authority for Data Protection and Freedom of Information (NAIH)
Registered office: 1055 Budapest, Falk Miksa utca 9-11., Hungary
Postal address: 1363 Budapest, P.O. Box 9, Hungary
Phone: +36 1 391 1400
E-mail: ugyfelszolgalat@naih.hu
Website: naih.hu

Court proceedings may also be initiated before the tribunal competent for your place of residence or stay.

11. Amendment of this notice

The data controller reserves the right to amend this notice. The version in force at any given time is continuously available on the website.

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Opus Numerology Services · Mátyási Renátó Gergő e.v.