Terms and Conditions – Octoro Technologies s.r.o., with registered office at Korunní 2569/108, Prague 10, 101 00, Czech Republic, Company ID: 23420464, VAT ID: CZ 23420464, File No.: C 426198 registered with the Municipal Court in Prague (hereinafter the "company" or "provider").
These Terms are originally drawn up in Czech and governed by Czech law; this English version is provided for convenience. In the event of any discrepancy, the Czech version prevails. This choice of law does not deprive a consumer of the protection afforded by the mandatory provisions of the law of their country of habitual residence.
diStudero is a web application (SaaS - Software as a Service) operated at the domain www.distudero.com, intended as a study aid for education, management and creation of study materials using artificial intelligence (AI) technologies. The service includes in particular the creation, AI generation, management and sharing of study materials (flashcards, quizzes, mind maps and others) and practice tests, generated from inputs and topics provided by the user. diStudero does not guarantee study outcomes (see Art. 9) and does not provide or resell real or past questions of standardized exams (e.g. SAT, IELTS, GMAT), nor does it support circumventing examination rules; the generated content serves solely for practice.
These Terms apply to the provision of the diStudero service and all related functionalities.
1.1. These Terms and Conditions (hereinafter the "Terms") govern the rights and obligations relating to the provision of the diStudero service, provided by Octoro Technologies s.r.o. (identification above), represented by Ondřej Tomášek, concluded with the user (hereinafter also the "customer") via means of distance communication through the provider's website interface. The Terms form an integral part of the service agreement. By registering or using the service, the user agrees to these Terms.
1.2. Payment gateways and invoicing. For payment processing, invoicing and tax remittance the provider uses two payment gateways, under which the sale takes place in two models:
In both cases, the provider of the diStudero service itself remains Octoro Technologies s.r.o., which is responsible for its operation, content, customer support and maintaining access to the paid subscription.
Which gateway is used is determined automatically based on the state of the subscription and is not the customer's choice. The default payment gateway is Polar, through which new payments take place.
1.3. If the contracting party is a consumer (a person other than an entrepreneur acting within their business activity), relationships not governed by these Terms are also governed by the Civil Code (Act No. 89/2012 Coll.) and the Consumer Protection Act (Act No. 634/1992 Coll.).
1.4. Age of users. The service is intended exclusively for persons over 18 years of age. By registering, the user confirms that they meet this condition. If the provider finds that the service is used by a person under 18, it may close their account and delete their personal data.
2.1. The product designation, a description of its main features and the price (including any taxes) are stated on the provider's website and in the payment gateway interface before completing the payment. No delivery costs are charged for online services.
2.2. The contractual relationship arises upon completing the order in the payment gateway interface and submitting it (by clicking the "Pay", "Submit" or similar button). By completing the order the customer confirms that they have read these Terms, agree to them and acknowledge that when paying through Polar, the seller towards them is Polar (Art. 1.2). A condition of a valid order is filling in all required details; acceptance of the offer with an amendment or deviation is excluded. Before submitting, the customer may review and correct the order.
2.3. The customer agrees to the use of means of distance communication when concluding the agreement. The agreement is concluded in the Czech language and, together with the tax document, is stored in the electronic archive of the provider and/or the Polar platform for the period required by law; it is not accessible to uninvolved third parties.
2.4. The provider is obliged to provide the ordered services and the customer undertakes to accept them and pay the price. The provider is released from the obligation to deliver the services in the event of technical problems or other objective obstacles, of which the customer will be informed.
3.1. The price is stated in the currency according to the current price list shown on the provider's website and in the payment gateway interface; the final amount for the given customer is always shown in the last step of the order before completing the payment (see Art. 3.2). The provider reserves the right to change the prices of subscriptions and credits; a change does not affect already purchased credits or the price of the currently running paid subscription period.
3.2. VAT and tax document. The applicable tax (VAT / sales tax) is determined, collected and remitted by the seller according to the jurisdiction and status of the customer. The customer receives the tax document (invoice / receipt) in electronic form (by e-mail and in the user profile, or in the customer portal); if they do not have access to it, they may contact the provider with a request. The user acknowledges that an electronic invoice has the same legal force as a paper one.
Final price and tax. The price of products and services, including information on whether it is inclusive or exclusive of VAT, is stated on the seller's selected web interface. The specific amount and applicability of tax may differ according to the customer's country and status. The final price including any tax is therefore always stated in the last step of the order in the payment gateway interface, which the customer confirms before completing the payment.
3.3. For cashless payments, the payment methods are connected to the Polar platform, which handles payment processing through its processors, or to Stripe. Payment card details are not stored by diStudero in any way. A payment card (e.g. VISA, MasterCard) and other methods offered in the payment gateway interface may be used. Payment is monthly, quarterly, annual or one-time depending on the type of product. If the payment is made by bank transfer (where possible), the customer is obliged to state the correct payment reference (variable symbol); without it the payment may not be identified and provision of performance may be delayed.
3.4. Purchase of credits. Credits can be purchased on a one-time basis through the payment gateway and are credited to the account as soon as possible after a successful payment.
3.5. Automatic subscription renewal. Recurring subscriptions renew automatically at the end of each period unless the user cancels the renewal. The payment is automatically charged to the payment method set for the given subscription. The user may cancel the automatic renewal at any time in the profile settings, or by contacting support; after cancellation the subscription remains active until the end of the paid period and no claim arises for a refund of the amount for that period. If the user has a trial period, they are informed 3 days in advance of the upcoming transition to the paid period.
4.1. Commencement of service provision before the expiry of the withdrawal period. By registering an account and activating a trial period or subscription, the user expressly agrees to the commencement of service provision immediately upon activation (i.e. after payment or after registering for the trial period), before the expiry of the statutory 14-day withdrawal period. The user has been advised and acknowledges that by giving this consent they lose the statutory right to withdraw from the agreement within the meaning of Section 1837(a) of the Civil Code. The service is deemed commenced at the moment access is activated, regardless of whether the user actually used it. Any refund after activation is entirely at the provider's discretion (see Art. 8).
4.2. The provider grants access to paid functions after the price is paid, usually immediately, no later than within three days. For services with a trial period, access is granted upon activation. The provider reserves the right to terminate the subscription, in particular in the event of suspected misuse or breach of the Terms.
4.3. Trial period. If a product includes a trial period and it is not cancelled during its course, the customer undertakes to pay for the service; they are informed of the approaching end 3 days in advance by e-mail. The provider reserves the right to terminate the trial period, in particular in the event of suspected misuse or breach of the Terms. If the customer does not pay after the end of the trial period, the provider is not obliged to continue providing the service.
4a.1. Voucher. A gift voucher (hereinafter the "voucher") is a product paid for once that grants access to the paid functions of the diStudero service to the extent and for the period stated in the voucher description. The voucher is bought by the purchaser (hereinafter the "purchaser"), usually for another person; the person who redeems the voucher is hereinafter referred to as the "recipient". A voucher is not a subscription: it does not renew automatically and the recipient pays nothing for it.
4a.2. Voucher parameters. The access period, the price, the redemption period and the refund conditions are stated in the voucher description on the provider's website before the order is completed. Each voucher is governed by the parameters published at the time of its purchase; later changes apply to vouchers already purchased only if they are more favourable for the purchaser or the recipient (e.g. an extension of the redemption period). The redemption period is also stated on the voucher and in the e-mail by which the voucher is delivered.
4a.3. Purchase and delivery. A voucher can be purchased without registration. The agreement is concluded under Art. 2 and the price is paid once under Art. 3. After payment, the voucher with its code is delivered by e-mail to the address provided by the purchaser in the order. The purchaser is responsible for the correctness of the details they enter in the order and for the content of any message they write on the voucher. If the message is unlawful, offensive or otherwise inappropriate, the provider may remove it from the voucher without prior notice and, in serious cases, invalidate the voucher and refund the price to the purchaser.
4a.4. Redemption. The recipient redeems the voucher by entering its code on the provider's page intended for redeeming vouchers; a link to this page is stated on the voucher and in the e-mail by which the voucher is delivered. The voucher can be redeemed after signing in to a user account or creating one; by doing so, the recipient expresses consent to these Terms. Only a person who meets the condition of Art. 1.4 may redeem the voucher. Each code can be redeemed only once and only on one account. The access period starts upon redemption of the voucher, not upon its purchase. If the account already has other access to paid functions at the time of redemption, the redemption may be restricted or the access period may be added on; the specific procedure is shown during redemption. When the access period ends, the access to paid functions obtained by redeeming the voucher ends, without automatic renewal and without any further payments.
4a.5. Redemption period. The voucher must be redeemed within the redemption period; once this period has expired, the voucher can no longer be redeemed. The provider may extend the redemption period on request or at its own discretion.
4a.6. Transfer and protection of the code. An unredeemed voucher may be passed on to another person. The voucher cannot be exchanged for money (except for refunds under these Terms) or for another product, and a redeemed voucher cannot be transferred to another account. The voucher code must be protected against misuse: the provider is not liable for the redemption of the voucher by a person who obtained the code from the purchaser or the recipient or through their fault, nor for the loss of the code, unless caused by the provider's error.
4a.7. Withdrawal and refunds. The service is provided only from the redemption of the voucher. By way of derogation from Arts. 4.1 and 6.1, a purchaser who is a consumer may therefore withdraw from the agreement without giving a reason within 14 days from purchase. For an unredeemed voucher the provider refunds the full price; for a redeemed one it refunds the price reduced by a proportional part for the access period already used, and ends the access. If the voucher description states a refund period (Art. 4a.2), the provider also refunds an unredeemed voucher upon a request made within that period. The withdrawal and the request are made by the purchaser under Art. 8.1 and the money is refunded under Art. 8.4. After the 14 days, a refund for a redeemed voucher is decided by the provider under Art. 8.2.
4a.8. End of validity. An unredeemed voucher ceases to be valid upon expiry of the redemption period, upon a refund (including a partial one) or upon reversal or dispute of the payment (chargeback). If a refund or a reversal of the payment occurs after the voucher has been redeemed, the provider is entitled to terminate the access obtained by redeeming it. In the event of a suspected fraudulent payment or other misuse, in particular attempts to guess codes or commercial resale of vouchers without the provider's consent, the provider may invalidate the voucher, refuse its redemption or terminate the access obtained by redeeming it.
4a.9. Other provisions. The provisions of these Terms on subscriptions apply mutatis mutandis to access obtained by redeeming a voucher, except for the provisions on payments, automatic renewal and termination of the subscription by the user (Art. 6.2). If the provider ceases to provide the service for operational reasons (Art. 6.3), it will refund to the purchaser the price of an unredeemed voucher and, for a redeemed voucher, a proportional part for the unused access period.
5.1. Access credentials are intended solely for the customer's personal use. The customer is obliged to maintain confidentiality regarding the access credentials; the provider bears no responsibility for their misuse by a third party.
5.2. The services provided through the web interface are protected under copyright law. Their distribution or provision to third parties without the author's consent is prohibited. The customer is liable to the provider for any damage caused by infringing the rights to the copyrighted work.
The generation of study materials and use of AI functions is limited by the limits set for the individual types of accounts and subscriptions. Specific limits are stated in the price list and tariff descriptions; the provider reserves the right to adjust them.
Some AI functions require the consumption of credits. Credits exist in two forms:
When using AI functions, subscription credits are drawn first and purchased credits afterwards. The number of credits for a specific function is shown before its use; the provider reserves the right to adjust the consumption. Consumed credits are non-refundable, except in the case of a technical error on the provider's side (see Art. 8.3).
Content generated by artificial intelligence is not a copyrighted work within the meaning of copyright law, as it was not created by a human. The user may use it under the following conditions:
Through the sharing function, content may be displayed to other users or the public (depending on the settings). The user is solely responsible for shared content and is obliged to have the right to share it and not to share content that contains personal data of third parties without consent, is unlawful, offensive, discriminatory, hateful or otherwise inappropriate. The provider reserves the right to remove such content without prior notice.
Anyone may report content they consider unlawful using the contact details in the contact section of the website (see the footer of the home page); the report should include a link to the content and the reasons. If the provider removes or restricts a user's content, it will inform the user and state the reasons, unless the law prevents it, and the user may object to the decision in the same way.
Ownership and intellectual property rights to content uploaded by the user (documents, notes, files, texts) remain with the user, or the respective rights holder. The user declares that they are entitled to use the uploaded materials within the service and to have content generated from them, i.e. that they have the necessary rights, the rights holder's consent or another lawful basis (see also Art. 5.4). By uploading content, the user grants the provider a non-exclusive, territorially unlimited licence for the duration of the contractual relationship and for the period necessary for the technical operation, backups, security and fulfilment of legal obligations, solely for the purpose of operating the service, processing the content (including AI functions requested by the user) and customer support. The provider does not use uploaded content for its own marketing purposes, nor does it make it public without a legal basis or the user's instruction.
6.1. Consumer withdrawal. Since all buyers, in accordance with Art. 4.1, agree to the commencement of service provision before the expiry of the withdrawal period, the statutory right to withdraw from the agreement within the meaning of Sections 1829 and 1837(a) of the Civil Code does not arise for the consumer, or ceases at the moment access is activated. This does not affect rights arising from defective performance (Art. 7) or the option to request a refund (Art. 8).
6.2. Termination of subscription by the user. The user may terminate the subscription at any time (by cancelling the automatic renewal) in the profile settings, in the payment gateway's customer portal or by contacting support. Access to paid functions remains until the end of the paid period. A paid subscription is not refunded (except under Art. 8). Upon termination, unused subscription credits expire; purchased credits remain.
6.3. Withdrawal / termination by the provider. The provider is entitled to withdraw from the agreement or terminate an active subscription, in particular for the following reasons:
If no payment is made (in particular upon a failed payment or non-renewal of the subscription), the provider is entitled to restrict or suspend access to paid functions with immediate effect until payment is made; this does not affect the provider's right to withdraw from the agreement after the expiry of the period stated above. In the event of a serious breach of the Terms, the subscription may be terminated immediately. In the event of termination for operational reasons (not for breach of the Terms by the customer), a proportional amount for the unused period will be refunded via Polar or Stripe. Unused subscription credits are not refunded; purchased credits remain on the account.
6.4. Unjustified payment dispute (chargeback). If the user initiates a payment dispute that is assessed by the bank or card association as unjustified, the provider is entitled to withdraw from the agreement with immediate effect and permanently cancel the account for breach of the Terms. In such a case the user has no claim to a refund of the price paid and is liable for damage caused to the provider, in particular for fees charged by the payment gateway. Given that the seller is in some cases Polar, the dispute is conducted against it; before initiating a chargeback we recommend contacting support first (see Art. 8).
7.1. The diStudero service is a digital content service. Rights and obligations from defective performance are governed by the relevant provisions of the Civil Code, in particular the general rules (Sections 1914–1925) and the rules on the provision of digital content (Section 2389a et seq., for consumers in particular Section 2389g et seq.). The provider warrants that the service is free of defects upon provision and for the duration of its provision; if a defect occurs, the customer is entitled to free remedy bringing it into conformity with the agreement, a reasonable discount, and, if remedy is not possible, to withdrawal and a refund of the price.
7.2. The customer shall report a defect without undue delay through the contact details stated in the contact section on the website (see the footer of the homepage) and attach proof of purchase and a description of the defect. For a continuously provided service, a defect may be reported for the duration of its provision. The complaint will be handled without undue delay, no later than within 30 days, unless the parties agree otherwise.
7.3. The provider is not liable for defects of which the customer was aware before acceptance or which the customer caused, nor for faults arising on the user's side (slow connection, an outdated or unsupported browser, etc.). diStudero is a study aid; study outcomes depend on the user themselves, and the provider therefore does not guarantee them (see Art. 9).
8.1. Processing. Refunds are decided by the provider. A request can be made to the provider (through the contact details stated in the contact section on the website – see the footer of the homepage), or, if the Polar payment gateway was used, to Polar support under its Buyer Terms and Conditions. This does not affect the consumer's rights arising from legal regulations.
8.2. Refund for a subscription. In accordance with Art. 4.1 and 6.1, the customer loses the statutory right of withdrawal; they may, however, request a refund. The request must contain proof of purchase, the date of purchase and a brief justification, and should be submitted from the e-mail registered on the platform; if submitted from another address, proof of purchase (an invoice), or other account details, must be provided to verify the customer's identity. Each request is assessed individually and the decision on the refund is entirely within the provider's discretion, which is entitled to reject the request without giving a reason. If the customer disagrees with the decision, they have the right to turn to out-of-court dispute resolution (see Art. 13.1).
8.3. Refund for credits and in the event of a technical error. Purchased credits are non-refundable, except in the case of a duplicate payment, credits not being credited, or another technical error on the provider's side; no refund is provided for already consumed credits or if the user simply changed their mind. If credits are consumed due to a technical error on the provider's side, the credits will be automatically returned to the account; if this does not happen, the user shall contact support. Credits are not refunded if the AI function worked correctly but the result did not meet the user's expectations.
8.4. Method and time frame. An approved refund is initiated by the provider and the amount is paid out by the same method as the payment was received (unless agreed otherwise); the time depends on the payment processor and is usually 5–10 business days. After approval, access to the product is deactivated and any unused credits for which the refund is provided are removed.
9.1. Availability. The user acknowledges that the service may not be available continuously, in particular due to maintenance, technical faults, third-party outages (cloud, API, AI providers, payment gateway) or objective obstacles. The provider does not provide guarantees of continuous availability beyond legal regulations and will take reasonable steps to restore operation as soon as possible. The provider is not liable for a temporary outage and the user is not entitled to a discount or compensation for damage.
9.2. Notice regarding AI content. The application uses various AI models and providers (incl. OpenAI, Google, Anthropic and others), which the provider reserves the right to change without prior notice. AI-generated content may contain inaccuracies, errors or outdated information and different models may provide different results. The user is obliged to verify all information from trustworthy sources before practical use. AI content serves only as a study aid and does not replace verified study materials.
9.3. Scope of liability. The provider is not liable for damage caused by circumstances on the side of the user or third parties, in particular:
The provider is not liable for indirect or consequential damage, lost profit, or for the user's study or examination results (in particular failure in exams, admission procedures or other assessments), even if the user used the diStudero service for their studies.
The user acknowledges that use of the service is associated with the risk of outages and accepts this risk. They are obliged to regularly back up important data, use the service in accordance with its purpose, verify AI content and secure their access credentials.
9.4. Limitation of compensation for damage. If the provider is liable for damage, it is liable only for culpably caused pecuniary damage directly connected with the provision of the service, and up to a maximum of the amount the user paid the provider for the subscription over the last 12 months, but at least CZK 500 (the higher of these amounts applies). The provider does not compensate for damage that could not have been reasonably foreseen at the time of concluding the agreement, nor for damage arising from the interruption, restriction or change of the service or its maintenance.
9.5. Limits of the limitation. All provisions of this Article apply only to the extent permitted by legal regulations and do not affect the consumer's rights from defective performance, to compensation for damage, or other rights that cannot be contractually limited or excluded.
10.1. The provider may interrupt or restrict provision of the service, in particular in the event of a breach of obligations by the user or suspected misuse, in the event of technical faults and maintenance, in the event of changes or outages at third-party providers and migrations, in the event of crisis situations (natural disasters, energy outages, measures of public authorities, etc.) or in other cases arising from legal regulations.
10.2. The provider may permanently terminate or restrict the service if it ceases to be capable of providing it, if it is not technically possible, or if the user materially breaches the agreement or the Terms.
10.3. When using the service, the user is obliged to comply with the legal regulations of the Czech Republic and the EU as well as the provider's instructions, not to use the service in a way that could harm the provider or third parties, and not to circumvent the technical and security measures of the service.
10.4. Changes to the service. The provider may change the service on an ongoing basis, including during a paid period: add, change or remove features, adjust their scope, limits and appearance, and change the technologies and suppliers used, in particular for reasons of service development, security, technical changes, changes at third parties or legal regulations. This does not entitle the user to a discount or other compensation. Changes are meant to improve the service, not to harm users; if a change significantly affects a user, they may contact the provider using the contact details in the contact section of the website and the provider will try to find a reasonable solution. This does not affect consumer rights that cannot be excluded by contract.
11.1. The provider respects the confidential nature of the customer's data and protects it against misuse. Data is processed for the purpose of carrying out the transaction (accounting, tax documents, identification of payments), customer communication and administration, and marketing.
11.2. Transfer to third parties. Personal data is not transferred to third parties, except for providers necessary for the operation of the service who are GDPR compliant:
Files uploaded to the service may be temporarily transferred to AI providers for the purpose of generating or analysing content; under their terms, these providers do not use the processed data for their training datasets. The list of specific providers may change according to operational needs.
11.3. The customer has the right to information about the processing of their data, its correction and other rights under the GDPR. Inquiries, suggestions and complaints can be directed through the contact details stated in the contact section on the website (see the footer of the homepage). The user may unsubscribe from marketing e-mail communication at any time via the link in the e-mail or by contacting the support mentioned above.
11.4. Cookies. The company uses cookies to ensure the functionality and comfort of the website and for traffic analysis (on the basis of legitimate interest under Art. 6(1)(f) GDPR). The use of cookies can be disabled in the browser. More in the Cookies Policy.
11.5. Detailed information on the processing of personal data can be found in our Privacy Policy.
12.1. Data storage. Unless stated otherwise, the company stores user data (flashcards, quizzes, uploaded files and other content) for the duration of active membership. It may delete account data after 30 days from the termination of the subscription, if it was not renewed, or in the case of a long-term inactive unpaid account. Throughout this time the user has access to the data (depending on the type of membership) and may handle it. The user will be informed of the planned deletion at least 7 days in advance at the registered e-mail, so that they can export the data and still use any purchased credits. Deletion of account data also extinguishes any remaining purchased credits. This does not affect data that the provider is obliged to retain under legal regulations.
12.2. Fair Use Policy. Each user has reasonable limits available for creating materials and using functions. The use of bots, automation or other software for abuse or excessive load on the application is prohibited without prior permission. In the event of a breach, the provider reserves the right to immediately close and block the account and terminate cooperation without any claim to a refund; purchased credits and the subscription are forfeited in such a case. If a user needs higher limits, they may contact the provider through the contact details stated in the contact section on the website (see the footer of the homepage).
12.3. The company reserves the right to suspend or terminate use by users who, through their use, breach the applicable legislation of the country in which the service is provided, without prior notice.
13.1. Out-of-court resolution of consumer disputes. Under Section 14 of Act No. 634/1992 Coll., a consumer has the right to out-of-court resolution of a consumer dispute. The entity for out-of-court resolution and at the same time the supervisory authority is the Czech Trade Inspection Authority (www.coi.cz). Out-of-court resolution by mediation is possible on the basis of mutual agreement of the parties.
13.2. Status of Polar and relationship to its terms. These Terms govern the relationship between the provider and the user regarding the provision of the diStudero service. In relation to payment processing, invoicing, tax remittance, refunds and the handling of payment disputes, Polar also acts as the seller (see Art. 1.2), to which Polar's Buyer Terms and Conditions also apply. In the event of a conflict, these Terms take precedence regarding the provision and content of the service and regarding consumer rights, while Polar's terms apply regarding the technical payment processing, taxes and invoicing. This does not affect the consumer's mandatory rights under the legal regulations of the Czech Republic and the EU.
13.3. Governing law and courts. The legal relationships between the provider and the customer are governed by the law of the Czech Republic (in particular the Civil Code, the Consumer Protection Act and the regulations on the protection of personal data and the GDPR); this does not affect the governing law set out in Polar's terms regarding payment processing, and the choice of law does not deprive a consumer of the protection afforded by the mandatory provisions of the law of their country of habitual residence. A consumer may bring proceedings before the court of their place of residence or the court of the provider's registered office, or turn to the entity for out-of-court resolution of consumer disputes (see Art. 13.1); for customers who are not consumers, the court with local jurisdiction is the court of the provider's registered office (Prague).
13.4. Changes to the Terms. The provider may change these Terms to a reasonable extent, in particular due to changes in legislation, the technical solution, the payment gateway or the scope of services. It publishes the new wording on www.distudero.com with its effective date and makes previous versions available on request.
13.5. Effectiveness. This version is published and dated 31 October 2026. For new users it is effective immediately (by consent upon placing an order or registering); for existing users in accordance with Art. 13.4.
