Terms of use and refund policy

DUDO Calculator 6th Generation

Effective as of: 25 February 2026

1. Introductory Provisions

These Terms of Use (hereinafter referred to as the “Terms”) govern the rights and obligations between:

 

DUDO Software s. r. o.
Dlhé diely I 6A, 841 03 Bratislava – Karlova Ves
Company ID No.: 56 907 290
Registered in the Commercial Register of the Municipal Court Bratislava III,
Section: Sro, File No.: 187190/B
E-mail: info@dudosoftware.com
(hereinafter referred to as the “Provider”)

and any natural or legal person using the online software service DUDO Calculator 6th Generation (hereinafter referred to as the “User” or the “Service”). By using the Service, registering an account, or purchasing credits, the User confirms that they have read, understood, and agree to these Terms in their entirety.

 

2. Nature of the Service

DUDO Calculator 6th Generation is a cloud-based software platform provided in the form of SaaS (Software as a Service). The Service enables the processing of input data entered by the User and the generation of a calculation report in the form of a PDF document. The output constitutes a mathematical-statistical model calculation created through algorithmic processing of parameters. The Service is a professional support tool. It does not constitute the provision of healthcare, a diagnosis, therapy, or a recommendation of a specific treatment procedure. The Service does not replace the clinical judgment of a physician or their professional responsibility.

 

Regulatory Statement

The Service is not a medical device, is not certified as a medical device, and is not intended for independent clinical decision-making. The Service serves exclusively as a supportive calculation and analytical tool for professionally qualified persons. The Provider assumes no responsibility for compliance of the use of the Service with local regulatory requirements in individual countries. The obligation to ensure regulatory compliance when using the Service lies solely with the User.

 

3. Designation of the Service – Professional Use Only

The Service is intended exclusively for professional use in the field of ophthalmology.

The User declares that:

  • they are a healthcare professional or act on behalf of a healthcare institution,
  • they use the Service exclusively within the scope of their profession or business activities,
  • they possess the professional qualifications required to interpret the outputs.

The User bears full responsibility for any clinical decisions based on the outputs of the Service. The Service is not intended for consumers. The Service is provided exclusively on a B2B (business-to-business) basis. The User declares that they do not act as a consumer within the meaning of Directive 2011/83/EU, the Civil Code of the Slovak Republic, or other consumer protection regulations, but as an entrepreneur or professional acting within the scope of their business or professional activity. If the User provides a false declaration regarding their status, they bear full responsibility for all consequences, and the Provider shall bear no liability.

 

4. Algorithmic Modeling and AI

The Service utilizes advanced mathematical models, including adaptive algorithms and elements of artificial intelligence. The models are based on historical data, statistical analyses, and internal validation processes. The outputs represent modeled calculations based on probabilistic data processing. Due to biological variability among patients, results may not be identical in all individual cases. The Provider reserves the right to update or optimize the algorithms without prior notice. The outputs of the Service are the result of probabilistic and model-based data processing and may contain inaccuracies, deviations, or limitations inherent to algorithmic modeling. The Provider is not responsible for the accuracy or completeness of input data, nor for the clinical interpretation of the outputs. The User acknowledges that no algorithm or model can guarantee an individual medical outcome.

 

5. Medical Disclaimer and Limitation of Warranties

The Provider does not provide any guarantee of a specific clinical outcome.

In particular, the Provider does not guarantee:

  • achievement of a specific refractive outcome,
  • complete independence of the patient from spectacle correction,
  • absence of residual refractive error,
  • long-term postoperative stability.

The Service is provided “as is” without any express or implied warranties.

 

6. Registration and Account

Use of the Service requires registration of a user account. The User is obliged to provide accurate and up-to-date information. The User is responsible for safeguarding login credentials and for all activities carried out through their account. The Provider is entitled to temporarily suspend or terminate an account in the event of a breach of the Terms or suspicion of unauthorized use of the Service.

 

7. Credit System

The Service operates on a prepaid credit basis.

1 credit = 1 EUR.
1 calculation = 5/10 credits per eye.

A calculation means processing of data and generation of a PDF report. Credits do not expire. Each newly registered User receives 20 free credits for testing purposes. The Provider reserves the right to modify the pricing policy for future credit purchases.

 

8. Payments

Payments are processed through a Merchant of Record (e.g., Paddle or another authorized payment service provider). The Provider shall not be liable for payment processing performed by third parties. Invoices may be issued by the Merchant of Record in accordance with its own terms and conditions.

 

9. Refund Policy

Once credits have been duly credited to the User’s account, refunds cannot be requested due to non-use or change of decision.

A refund is possible exclusively in the case of:

  • duplicate payment,
  • technical error of the payment system,
  • unauthorized payment.

A refund request must be submitted in writing within 14 days from the date of payment.

 

10. Data Entered into the System

The Service allows entry of biometric parameters, age, sex, and an internal case identifier. The Service is not intended for processing directly identifiable personal data of patients. The User must not enter names, personal identification numbers, or any other identifying information. The User is fully responsible for compliance with applicable data protection laws.

 

11. Data Retention

Data and system logs are retained for a period of 24 months. After this period, they may be deleted or anonymized.

 

12. Limitation of Liability

The Provider shall not be liable for the User’s clinical decisions. The Provider shall not be liable for personal injury, economic loss, loss of profit, or consequential damages. The Provider’s maximum liability shall be limited to the total amounts paid by the User during the preceding 12 months. The Provider shall not be liable for indirect, consequential, reputational, regulatory, or punitive damages, nor for claims brought by patients or third parties against the User.

 

13. Indemnification

The User agrees to indemnify and hold the Provider harmless against any claims by third parties arising from use of the Service in violation of these Terms or applicable laws.

 

14. Intellectual Property

The software, algorithms, databases, source code, and know-how are the exclusive property of the Provider. Copying, decompilation, reverse engineering, or any other unauthorized use is strictly prohibited.

 

15. Duration and Termination

These Terms remain effective for the entire duration of use of the Service. The User may terminate their account at any time. The Provider may suspend or terminate an account in the event of a breach of the Terms. Termination of the account does not give rise to any right to a refund of unused credits.

 

16. Force Majeure

The Provider shall not be liable for inability to provide the Service due to force majeure circumstances, including but not limited to internet outages, cyberattacks, acts of public authorities, or other unforeseeable events beyond its control.

 

17. Severability

If any provision of these Terms becomes invalid or unenforceable, the remaining provisions shall remain in full force and effect.

 

18. Governing Law and Jurisdiction

These Terms shall be governed by the laws of the Slovak Republic, without regard to conflict-of-law rules. Any disputes arising in connection with the Service shall be exclusively resolved by the competent courts of the Slovak Republic. The User expressly waives the right to initiate proceedings before any other court or authority.

 

Refund Policy

DUDO Calculator 6th Generation

DUDO Calculator 6th Generation is a digital software service provided in the form of SaaS. Purchased credits constitute digital content made available to the User immediately after successful processing of payment. The User acknowledges that this constitutes digital content supplied immediately upon payment and hereby expressly agrees to the loss of the right of withdrawal, should consumer protection regulations exceptionally apply to the contractual relationship. For this reason, once credits have been credited to the User’s account, no refund may be requested due to non-use, change of decision, or termination of use of the Service.

A refund is possible exclusively in the following cases:

  • duplicate payment
  • demonstrable technical error of the payment system
  • unauthorized payment (e.g., payment card misuse), duly documented

A refund request must be submitted in writing to info@dudosoftware.com within 14 days from the date of payment. The Provider reserves the right to individually assess the validity of each request. If payment is processed through a Merchant of Record (e.g., Paddle), refunds are also subject to the terms and conditions of such payment service provider. By placing an order and completing payment, the User expressly agrees that the digital content is made available immediately upon payment and acknowledges that any right of withdrawal under applicable consumer protection laws, if applicable, is thereby waived.