Legal Documents

Terms of Use — memozero

Last updated: 5 May 2026

This English version is a non-binding translation of the German “Nutzungsbedingungen” provided for convenience. The contract language is German (see Section 3.5); in case of any discrepancy, the German version shall prevail.

1. Scope

1.1 These Terms of Use (hereinafter referred to as “Terms”) of DK Tech Solutions UG (haftungsbeschränkt) (hereinafter referred to as the “Seller”) apply to all contracts for the provision of the memozero application (hereinafter referred to as the “Application”) and the license codes required for it that a buyer (hereinafter referred to as the “Customer”) concludes with the Seller. The inclusion of the Customer’s own terms is hereby objected to, unless something else has been agreed in writing in advance.

1.2 The Customer may be a consumer or an entrepreneur or business. A consumer is any natural person who concludes a legal transaction for purposes that are predominantly outside their trade, business, or profession (cf. § 13 of the German Civil Code, BGB). An entrepreneur, by contrast, is any person who concludes a legal transaction in the exercise of their trade, business, or profession (cf. § 14 BGB).

1.3 A Seller within the meaning of these Terms is any natural or legal person, or partnership with legal capacity, who, when concluding a legal transaction, acts in the exercise of their trade, business, or profession.

2. Subject Matter of the Contract

2.1 The subject matter of the contract is the provision of the Application offered by the Seller in electronic form, granting specific rights of use that are unlocked via a license code and governed by these Terms.

2.2 The Customer does not acquire any intellectual property in the Application. The source code of the Application is not part of the Application provided, neither in the free (trial) version nor in the paid version. Decompiling or analyzing the source code is — like any form of reverse engineering, unless mandatorily permitted by law — accordingly prohibited.

2.3 The Application is provided for download independently and, after creating a customer account and entering payment details, can be used free of charge for a period of 14 days (trial period), in each case for one device.

After the trial period expires, a paid usage period begins automatically, unless the Customer has previously cancelled automatic activation.

Unless these Terms provide otherwise, the duration, scope, and cost of the paid usage period are governed by the tariff selected by the Customer during the order process.

The current tariff information (in particular price, term, and cancellation options) is shown clearly to the Customer during the ordering process before completing the order, and is also available on the Seller’s website at memozero.io/pricing.

The usage period is automatically renewed by the period selected during the ordering process, unless cancelled at any time before the end of the current usage period via the customer portal.

Cancellation is possible at any time electronically via the customer account.

2.4 Part of the contract is the provision of a license code for the Application, the provision of updates and relevant information about updates, feature extensions of the Application, or supplementary products. Such information is sent to the email address that the buyer entered and confirmed at the start of their order.

2.5 Technical support is not part of the contract. The Application has only an automatic installation aid. In addition, the buyer can contact the Seller via a contact form on the official memozero web page (memozero.io/contact) with a request for individual support (e.g., for error messages, assistance, and remarks; feedback and suggestions are also possible). However, how quickly and to what extent a response can be given depends on the Seller’s workload. There is no entitlement to a particular service (e.g., a solution to the problem within 24 hours).

3. Conclusion of Contract

3.1 The Application described on the Seller’s website does not constitute a binding offer by the Seller. It serves merely to enable the Customer to submit a binding offer. In other words, the website states only what the Seller could offer. A contract is concluded only once a Customer’s order has been placed and is actively accepted by the Seller.

3.2 The Customer can submit the offer via the online order form integrated into the Seller’s online shop. After placing the selected Application in the virtual shopping cart and going through the electronic ordering process, the Customer submits a legally binding contractual offer for the license code/Application to be acquired by completing the ordering process.

3.3 The Seller may accept the Customer’s offer within seven days,

  • by sending the Customer a written order confirmation or an order confirmation in text form (fax or email), in which case receipt of the order confirmation by the Customer is decisive, or
  • by providing the Customer with the ordered Application or the ordered license code (where applicable, automatically), or
  • by requesting payment from the Customer after the order has been placed.

If several of the foregoing alternatives apply, the contract is concluded at the time at which one of the foregoing alternatives first occurs. The period for accepting the offer begins on the day after the Customer sends the offer and ends at the end of the seventh day following the dispatch of the offer. If the Seller does not accept the Customer’s offer within the foregoing period, this is deemed a rejection of the offer, with the consequence that the Customer is no longer bound by their declaration of intent.

3.4 If a payment method offered by Stripe is selected, payment processing is carried out via the selected payment service provider. More information on Stripe’s terms of use can be found at stripe.com/de/legal/consumer. If the Customer pays via a payment method offered by Stripe during the online ordering process, the Seller hereby automatically declares acceptance of the Customer’s offer for the moment in which the Customer completes the ordering process.

3.5 Only the German language is available for concluding the contract (as of 5 May 2026).

3.6 Order processing and contact generally take place by email and on an automated basis. The Customer must ensure that the email address provided for order processing is correct, so that emails sent by the Seller can be received at this address. In particular, when using SPAM filters, the Customer must ensure that all emails sent by the Seller can be delivered.

4. Right of Withdrawal and Withdrawal Information for Consumers and Businesses

4.1 Consumers have a statutory right of withdrawal pursuant to the following provisions. The Seller voluntarily grants entrepreneurs a contractual right of withdrawal pursuant to these provisions.

4.2 Each Customer has the right to withdraw from the contract within fourteen days without giving reasons. The withdrawal period is fourteen days from the day on which the contract is concluded. The contract is concluded with the provision of the license code for activation of the Application.

4.3 With the provision of the license code, a 14-day trial period begins, during which the Application can be tested in full. To activate it, the Customer enters their payment details via Stripe; however, no charge is made until 14 days have elapsed. If the Customer withdraws from the contract within these 14 days (see Section 4.2), no payment is triggered. With the expiry of the 14-day trial period, the withdrawal period also ends, and the agreed remuneration becomes due for the first time.

4.4 To exercise the right of withdrawal, the Customer must inform the Seller of their decision by means of an unambiguous statement (e.g., a letter sent by post or by email to info(at)memozero.io). To meet the deadline, it is sufficient for the notification to be sent before the end of the 14-day period.

4.5 In the event of an effective withdrawal, payments already made will be refunded without delay and at the latest within 14 days from the day on which notification of the withdrawal of this contract is received by the Seller. The same means of payment will be used for the refund as the Customer used for the original transaction, unless something else has been expressly agreed.

4.6 In the event of timely withdrawal, no payments become due, and any payments already received will be refunded without delay. The same means of payment will be used for the refund as was used for the original transaction.

5. Prices and Payment Terms

5.1 Unless the Seller’s product description states otherwise, the prices indicated are total prices including VAT. The current prices are shown on the Seller’s website.

5.2 For payments in countries outside the European Union, additional costs may arise in individual cases for which the Seller is not responsible and which are to be borne by the Customer. These include, for example, costs for transferring funds via credit institutions (e.g., transfer fees, exchange-rate fees).

5.3 The available payment option(s) will be communicated to the Customer via Stripe.

6. Provision of the Application and License to Use

6.1 The Seller provides the Application by making digital copies of the installation files (for Windows or Apple macOS) available to the Customer over the Internet. The download is possible both via a public area of the Seller’s website and directly within the buyer’s personal customer account. The Customer is responsible for storing the copy at a location of their choice.

6.2 To initiate the license acquisition, the entry of a valid email address is required. To ensure ownership, the Seller sends a verification link to the specified mailbox. Only after successful confirmation of this link (double opt-in) can the Customer proceed with selecting a payment method and completing the order.

6.3 Payment processing is carried out via the service provider Stripe. With the confirmation of the payment method and the start of the 14-day trial period, the contract is performed. Immediately after this process is completed, the Customer is forwarded to an account overview within the application environment.

6.4 The license code required to activate memozero is displayed to the Customer immediately after completion of the ordering process directly in their account overview. In the account overview, the Customer can also view the status of their subscription and manage the link to their device.

6.5 Product provision is complete once the Application and the associated license code have been made available to the buyer in the account overview. This time is decisive for the start of the 14-day trial period and the withdrawal period.

7. Granting of Rights of Use

7.1 Unless the Seller’s product description states otherwise, the Seller grants the Customer the right to use the Application for the period acquired in each case for private, scientific, and/or professional purposes.

7.2 Per license code, only one device can be linked at the same time. However, a new code can be generated at any time in the user account in order to activate the Application on a different device. In this case, the old license code on the previous device loses its validity.

7.3 Renting, sublicensing, or reselling the Application or the acquired license code to third parties is not permitted.

7.4 The Customer is prohibited from removing and/or modifying any existing copy protection.

7.5 The Customer is entitled to make one copy of the Application for backup purposes. Reproductions of the Application that serve proper data backup are part of the intended use.

7.6 If multiple licenses or accesses to the Application are sold to a Customer and/or set up on-site, this must be recorded separately and in writing, in which case a different purchase amount may also be negotiated. Without separate agreement, integration of the software into third-party server structures is not permitted.

7.7 The grant of rights becomes effective at the start of the trial period. For the paid usage period, continued use is conditional on the agreed remuneration having been paid in full.

7.8 If the Customer breaches the agreed rights of use so seriously that continued adherence to the contract cannot reasonably be expected of the Seller, the Seller may terminate for cause the agreement granting rights of use in the affected Application.

7.9 In the event of termination, the Customer is obliged to delete all existing copies of the Application and to confirm this to the Seller in text form, if so requested by the Seller.

7.10 Upon expiry of the license, the license code loses its validity, with the result that it is no longer possible to start a new transcription in the Application. Transcripts that have already been created or edited can still be opened, edited, and exported without restriction.

7.11 Other statutory and contractual provisions remain unaffected.

7.12 A demand for the deletion of device data essential for license verification may lead to deactivation of the software.

8. Customer’s Duties to Cooperate

8.1 The Customer must inform themselves on the Seller’s website about the essential functional features of the Application. Setting up a functional hardware environment for the Application that is also adequately dimensioned in view of the additional load imposed by the Application is the sole responsibility of the Customer.

8.2 The Customer must observe the instructions provided by the Seller for installation and operation of the Application.

8.3 memozero follows a “local-first” approach; all files created (e.g., transcripts) are stored exclusively locally on the Customer’s computer system and never on the Seller’s servers. The Customer is hereby informed that uninstalling the Application does not result in the automatic deletion of these locally stored data files. The Customer is free to delete these files manually. In the event of a later reinstallation of the Application on the same system, existing local files are automatically detected and reloaded into the Application. The Seller recommends that the Customer take appropriate precautions for the event that the Application does not function properly in whole or in part (e.g., daily data backup, fault diagnosis, regular checks of data processing results) and perform a suitable backup of their data prior to installing the Application.

8.4 The Customer is aware that the quality of automatic transcription depends on audio quality and that the AI model used can and will make mistakes. memozero therefore offers various features to support the review and refinement of the transcript. To ensure the accuracy of transcripts, such independent review and, where applicable, correction of transcripts by the respective user is mandatory. As with all AI-generated content, unverified use is strongly discouraged.

8.5 The Seller is not liable for content errors in automatically generated transcriptions, unless these are based on intentional or grossly negligent conduct of the Seller. Liability for damages arising from inadequately reviewed use of automatic transcriptions is excluded to the extent permitted by law.

8.6 Since memozero is an offline application, the user must take care of appropriate and, where applicable, legally required security of their hardware and backups themselves.

9. Technical Foundations and Models

9.1 To deliver transcription and speaker recognition, memozero uses technologically leading open-source components and models from established providers and research projects. These include in particular:

  • Whisper (OpenAI): the core model for multilingual speech recognition.
  • Faster-Whisper and CTranslate2 (SYSTRAN, Guillaume Klein et al.): components that provide the engine for optimized local inference.
  • Insanely-Fast-Whisper (Vaibhav Srivastav): maximizes transcription performance on end devices.
  • pyannote.audio (Hervé Bredin): the primary framework for speaker diarization to distinguish different speakers.
  • WhisperX (Max Bain): a framework that delivers precise word alignment and timestamps.
  • whisper.cpp (ggml-org): enables efficient C/C++ inference for Whisper models.
  • pywhispercpp (absadiki): provides the necessary Python bindings for whisper.cpp.

9.2 The Seller endeavors to always use the most up-to-date and most powerful models available on the market. The Seller reserves the right to replace existing models with newer versions or to integrate additional models, provided these promise an improvement in quality or functionality.

9.3 The Application uses components that are subject to various open-source licenses (e.g., the MIT license). A detailed list of the libraries used and the associated license texts is available to the Customer at any time within the Application (e.g., in Settings or under “Licenses”). The respective open-source license terms take precedence over these Terms within the scope of their applicability.

9.4 Regardless of the origin of the models, execution and data processing in the memozero desktop application take place exclusively locally on the Customer’s end device. There is no transmission of audio content to the model providers mentioned or to any other external servers. The technical architecture (based, among other things, on FastAPI and Electron) is specifically designed for this local data sovereignty.

10. Warranty for Defects

If the Application is defective, the statutory warranty provisions apply.

11. Applicable Law

All legal relationships between the parties are governed by the law of the Federal Republic of Germany, to the exclusion of the laws on the international sale of movable goods. For consumers, this choice of law applies only insofar as the protection granted by mandatory provisions of the law of the state in which the consumer has their habitual residence is not thereby withdrawn.

12. Place of Jurisdiction

If the Customer is a merchant, a legal entity under public law, or a special fund under public law domiciled in the territory of the Federal Republic of Germany, the exclusive place of jurisdiction for all disputes arising from this contract is the Seller’s place of business. If the Customer is domiciled outside the territory of the Federal Republic of Germany, the Seller’s place of business is the exclusive place of jurisdiction for all disputes arising from this contract if the contract or claims under the contract can be attributed to the Customer’s professional or commercial activity. In the foregoing cases, however, the Seller is in any event entitled to appeal to the court at the Customer’s place of business.

13. Alternative Dispute Resolution

13.1 The European Commission provides a platform for the out-of-court settlement of disputes arising from online sales or service contracts at the following link: ec.europa.eu/consumers/odr

13.2 The Seller is not obliged to participate in dispute resolution proceedings before a consumer arbitration board.