Privacy Policy

Who we are

Say Equation is a service operated by UNIHOLIX OÜ, a private limited company registered in Estonia (registry code 17479878), Sepapaja tn 6, 11415 Tallinn, Estonia. We are the controller of the personal data described in this policy. Contact: ceo@uniholix.com.

What we process and why

In short: you say or write one formula, it is sent to us once to turn it into LaTeX, and we keep neither what you sent nor the result.

• What you write. When you write a formula in words and convert it, the text you wrote and your page language are sent to our server. Our server passes them to our AI model provider to write the LaTeX. We do not keep the text or the LaTeX after the answer has been sent back to you.
• Your voice. The microphone is on only while you hold the button, for up to 30 seconds. When you let go, your browser sends that one recording to our server, which passes it to our AI model provider to write the LaTeX. We do not keep the recording, the text it contains or the LaTeX. We do not use your voice to recognise or identify you, and we do not create any voice print or other biometric template.
• Payment data. If you buy a pack, our payment processor handles your payment. We receive your email address, your country, the amount, the currency, the pack you bought and the payment status, together with your confirmation that you asked for immediate delivery. The payment record also keeps how many of the pack's conversions you have used, short one-way fingerprints of your last few conversions so that the same request sent again within a day is not counted twice, and a one-way fingerprint of your pack code, never the code itself. Your card details go only to the payment processor and never reach us.
• Emails to us. If you write to us, we use your email address and your message to answer you.
• Technical data. Our server uses your IP address for a short time to count the free conversions of the day, to limit the number of requests and to keep the service secure. Our hosting provider keeps standard request logs, such as the IP address, the time and the page requested. These logs do not contain your formulas or recordings.
• Data on your device. The page keeps your language, your pack codes with how many conversions they have left and your last result in your browser's storage. This data stays on your device. You can delete it at any time in your browser settings.
• No tracking. We do not use analytics or advertising cookies, and we do not use any analytics or advertising trackers.

Say or write only the formula. Do not include names, contact details, student numbers or other personal data, and record only your own voice.

Your LaTeX is produced by AI for your own use. It can be wrong, and it is not professional advice. We do not use it to make any decision about you.

We do not sell your personal data, we do not use it for advertising, and we do not use your formulas, recordings or results to train AI models.

The service is for people aged 13 or older (or the higher minimum age in their country), people under 18 may use it only with the permission of a parent or guardian, and we do not knowingly process personal data of younger children.

Legal bases

• Contract (GDPR Art. 6(1)(b)): turning your formula into LaTeX, running your pack, taking your payment and answering your questions about a purchase.
• Legitimate interests (Art. 6(1)(f)): counting free conversions, keeping the service secure, preventing fraud and abuse, and answering other messages.
• Legal obligations (Art. 6(1)(c)): keeping accounting records, including payment records, as Estonian law requires.

Who processes it for us

We use service providers that process personal data on our behalf and on our instructions. We describe them here by category.

• Payment processor: takes payments and emails your receipt. It also processes payment data as an independent controller for its own legal duties, such as fraud prevention, under its own privacy policy.
• AI model provider: turns your words or your recording into LaTeX. We use only a paid commercial service that does not use your data to train its models. It may keep inputs and results for a limited time to detect misuse, under its own terms.
• Hosting and database provider: runs the website, keeps request logs and stores payment records.
• Email provider: receives and stores the emails you send us.

Some of these providers process data outside the European Economic Area, for example in the United States. Where they do, the transfer relies on an adequacy decision of the European Commission or on the Commission's Standard Contractual Clauses.

How we protect it

All connections to the service and to our providers are encrypted. Access to our systems is limited to the people who need it and is protected by two-step sign-in. Card details are handled only by our payment processor.

How long we keep it

• What you write, your recordings and your LaTeX: not kept. They are used only while your conversion is being produced.
• Payment records, including your pack's count, the fingerprints of your last conversions and your confirmation of immediate delivery: 7 years, as the Estonian Accounting Act requires.
• Emails to us: as long as we need them to deal with your request, and no longer than 2 years after it is closed, unless they are part of accounting records.
• Request and security logs: up to 2 years. Data used to count free conversions and to limit requests is held in memory only, for no more than a day.

Your rights

You can ask us to give you access to your personal data, to correct it or delete it, to restrict its processing or to stop processing it, and to give you a copy in a portable format.

To use these rights, email ceo@uniholix.com. We answer within one month. If a request is complex, we may need up to two more months, and we will tell you so within the first month. Because we do not keep your formulas, recordings or results, we usually hold no personal data about you other than payment records and emails you sent us.

You can also complain to the Estonian Data Protection Inspectorate (Andmekaitse Inspektsioon, AKI, www.aki.ee) or to the data protection authority in the country where you live or work.

Additional notices for some regions

California. If you live in California, the California Consumer Privacy Act, as amended by the California Privacy Rights Act (CCPA/CPRA), gives you the right to know what personal information we collect, use and disclose, the right to have it deleted, the right to have it corrected, and the right not to be discriminated against for using these rights. We do not sell or share your personal information, as those terms are defined in that law. To use your rights, email ceo@uniholix.com.

United Kingdom. If you are in the United Kingdom, the UK GDPR and the Data Protection Act 2018 give you the rights described above. You can also complain to the Information Commissioner's Office (ICO).

Brazil. If you are in Brazil, the General Personal Data Protection Law (LGPD) gives you rights that include confirmation that we process your data, access, correction, anonymisation, blocking or deletion, portability, and information about who we share it with. To use these rights, email ceo@uniholix.com. You can also complain to the National Data Protection Authority (ANPD).

Republic of Korea. If you are in the Republic of Korea, the Personal Information Protection Act (PIPA) gives you the right to access your personal information and to ask us to correct it, delete it or stop processing it. To use these rights, email ceo@uniholix.com. Your personal information is processed outside Korea by the service providers described in this policy.

Changes

We may update this policy when the service or the law changes. The current version is always on this page. If a change significantly affects how we process your personal data, we will announce it on the service before it takes effect.