MindDuck Terms of Use

MindDuck Terms of Use

Version 1 of 5 October 2026

MindDuck is operated by Dmitriy Klein (full provider details in the Imprint). Contact: support@mindduck.app.
Scope of service. MindDuck is an application for working with AI chats, notes, documents, attachments and search. The features, system requirements, compatibility, limitations and period of use are set by the offer agreed when the contract is concluded. For test access, the Beta Participation Agreement also applies.
Additional guarantees, customisation, training and support with guaranteed response times are not included unless expressly agreed separately. The same applies to recovering damaged or lost data beyond our statutory obligations. Statements about possible features and development plans are not a promise of a release date. Obligations to remedy defects are governed by law.

Account.

Use an email address you have access to and keep your login codes private. You may not share a personal account or licence with others beyond the agreed scope. Report any unauthorised access to support@mindduck.app. When restoring access, you may need to prove that the account belongs to you.
Licence and intellectual property. We grant a simple (non-exclusive) right to install and use MindDuck within the term, number of users and number of devices stated in the licence. Perpetual rights under a paid licence are additionally subject to the terms shown at purchase.
The rights to the application, its code and its design remain with their respective rights holders. Without permission you may not distribute, rent out, modify or decompile the application, give others access to it or circumvent licence restrictions. These restrictions do not apply where an action is permitted by mandatory law, in particular use in accordance with its purpose, making a backup copy, observing and testing the program, achieving interoperability and reselling lawfully acquired copies. Third-party components are subject to their own licences as stated in the package.

Devices and network.

The device limit is stated before you obtain the licence and shown in your account. To replace devices, up to ten self-service deactivations or replacements are available within any 30 days. Once this allowance is used up, further replacements are handled via support@mindduck.app. A device that has not checked its access for 90 days no longer occupies an active slot.
To obtain and renew proof of access, the application connects to the MindDuck service. A confirmation is valid for up to 45 days, but never beyond the end of the licence term. After that, active features require a new check. The confirmation period does not extend the licence. Whether and for how long a particular build works offline is stated before you obtain it.

AI and external services.

AI providers, cloud storage and other external services connected by the user are used under separate contracts with their providers. Their costs are not included in the MindDuck licence. The user chooses the provider, reviews its terms and pays for usage, including requests made by background features the user has enabled.
When AI is used, the request, the necessary context and the relevant attachments are sent to the chosen AI provider; the context may include material found by the application’s memory feature. With OpenRouter, recipients may be OpenRouter and the provider of the model concerned. Sync, external tools, web search and audio and image processing may involve further data transfers; these are described in the Privacy Policy and in the interface of each feature.
We do not guarantee the availability, stable pricing or results of independently connected external services. Our responsibility for our own integration and for our own breaches of duty remains unaffected.
AI answers may be inaccurate, incomplete or unsuitable for a particular purpose. The user checks them and any suggested actions before acting on them. MindDuck is not offered as a medical, legal or financial advice service and is not intended to autonomously control processes whose failure could endanger life or health.
Content and security. The rights to user content remain with the respective rights holders. The user is responsible for the lawfulness of the content they upload and transmit, for holding the necessary rights and for having a legal basis to process other people’s personal data. You may not use MindDuck for unlawful purposes, disrupt the operation of the service or attempt to access other people’s accounts.
The user is responsible for protecting their devices and keys and for keeping independent backups of important data. Encrypted content may not be recoverable without the necessary keys. Sync is not a substitute for an independent backup. Any contributory fault of the user is taken into account in accordance with the law.

Support.

Requests are accepted via the feedback form and at support@mindduck.app. Files attached by the user are used to handle the request. Do not attach passwords, API keys, recovery codes or information unrelated to the problem. Any further support is provided only under a separately agreed offer.

Updates and changes.

Updates required by law, in particular security updates, are provided to the extent required by law. Further versions and features are provided according to the agreed offer.
Where the product is provided on an ongoing basis, changes beyond what is necessary are permitted if justified by changes in the technical environment, a security risk, a change in law or a change to the interface of an external service. They are made at no additional cost for the change itself and with the notices required by law. Where § 327r of the German Civil Code (BGB) applies, its conditions for changes and the right to terminate are observed.
A new version of these terms applies to new contracts. Changes to an existing contract require a separate basis; merely publishing a new text on the website does not change it.

End and restriction of access.

When the licence term ends, active features such as creating and editing content, import, restore, AI and sync uploads require new valid access. An installed compatible version still lets you view, search, export, back up and delete content stored previously. The availability period of TestFlight builds is set out in the Beta Participation Agreement. This does not imply any obligation to maintain the program indefinitely or keep it compatible with future systems.
Closing your account in the account settings or by request to support@mindduck.app ends the associated login and licence checks. Save the documents and data you need before closing it. Closing an account and withdrawing from a purchase are separate actions.
In the event of a material breach of contract or a specific security threat, we may restrict the affected access proportionately. A warning and a period to remedy the breach are given where required by law; where justified, immediate action may be taken. Termination for good cause is governed by law. The end of a licence does not by itself delete any local content.

Defects and liability.

If the digital product is defective, the statutory rights apply.
We are liable without limitation for intent and gross negligence, for culpable injury to life, body or health and in all other cases where liability cannot be limited by law, including liability under the German Product Liability Act. The limitations below also do not apply to liability under an expressly given guarantee or where a defect was fraudulently concealed.
In the case of simple negligence, we are liable only for breach of a material contractual obligation, that is, an obligation whose fulfilment makes proper performance of the contract possible in the first place and on whose fulfilment the user may regularly rely. In that case, liability is limited to the damage that was foreseeable and typical for this contract when it was concluded. Otherwise, liability for simple negligence is excluded.
These rules also apply to liability for our legal representatives and vicarious agents. The limitations of liability do not affect the statutory rights to subsequent performance, price reduction and termination of the contract.

Governing law.

German law applies. Consumers retain the protection of the mandatory provisions of the law of the country of their habitual residence.