Terms of Service

Last updated: March 12, 2026

The German version of these terms is legally binding. Translations are provided for convenience only.

§ 1 Scope & Provider

These General Terms and Conditions ("Terms") govern the use of the Ambralia web application ("Service"), a digital notecard system for capturing, connecting, and querying book notes.

The provider is:

Theo Conrads Kaiserstraße 49 42329 Wuppertal Germany Email: [email protected]

By registering for and using the Service, you agree to these Terms.

§ 2 Account & Usage

Use of the Service requires registration with a valid email address.

Users are responsible for maintaining the confidentiality of their account credentials.

The Service is available in the following tiers:

Free: 5 sources, 20 notes, 10 AI queries per day
Pro: Unlimited sources, notes, and AI queries (€2.99/month)

§ 3 Payment & Subscriptions

Payment processing for the Pro subscription is handled by Polar Software Inc. as Merchant of Record. Polar's terms of service apply to all payment transactions.

Subscriptions are billed monthly and can be canceled at any time. Cancellation takes effect at the end of the current billing period.

Price changes will be communicated at least 30 days in advance.

§ 4 Right of Withdrawal (Widerrufsbelehrung)

Right of Withdrawal

You have the right to withdraw from this contract within fourteen days without giving any reason.

The withdrawal period is fourteen days from the date of conclusion of the contract.

To exercise your right of withdrawal, you must inform us

Theo Conrads Kaiserstraße 49 42329 Wuppertal Email: [email protected]

by means of a clear statement (e.g. a letter sent by post or an email) of your decision to withdraw from this contract.

To meet the withdrawal deadline, it is sufficient for you to send the communication concerning your exercise of the right of withdrawal before the withdrawal period has expired.

Consequences of Withdrawal

If you withdraw from this contract, we shall reimburse to you all payments received from you, without undue delay and at the latest within fourteen days from the day on which we received the notification of your withdrawal of this contract. For this reimbursement, we will use the same means of payment that you used for the original transaction, unless expressly agreed otherwise with you; in no case will you be charged any fees for this reimbursement.

If you requested that the services should commence during the withdrawal period, you shall pay us a reasonable amount corresponding to the proportion of the services already provided up to the time at which you inform us of the exercise of the right of withdrawal under this contract, compared to the total scope of the services provided for in the contract.

Early Expiry of the Right of Withdrawal

Your right of withdrawal expires prematurely if, during the Pro upgrade, you have expressly consented to us commencing the performance of the contract before the expiry of the withdrawal period and you have confirmed your awareness that by giving your consent at the commencement of performance you lose your right of withdrawal (§ 356 para. 5 BGB). This consent is obtained via a separate checkbox during the Pro upgrade process.

Model Withdrawal Form

(If you wish to withdraw from the contract, please complete this form and return it.)

To:

Theo Conrads Kaiserstraße 49 42329 Wuppertal Email: [email protected]

I/We (*) hereby withdraw from the contract concluded by me/us (*) for the provision of the following service (*):

Ordered on (*) / received on (*): Name of the consumer(s): Address of the consumer(s): Signature (only for paper notification): Date:

(*) Delete as appropriate.

§ 5 User Content & Intellectual Property

Users retain full ownership of all content they create within the Service, including notes, book entries, and associated metadata.

By using the Service, users grant Ambralia a limited, non-exclusive license to process their content solely for the purpose of providing the Service's functionality (e.g., AI-powered search, graph visualization, topic suggestions).

User content is not used for AI model training or shared with third parties.

§ 6 Liability Limitations

The statutory warranty rights for digital products apply to the Service (§§ 327 ff. BGB). The provider shall supply updates necessary to maintain the conformity of the Service, including security updates.

Ambralia does not guarantee the accuracy, completeness, or usefulness of AI-generated answers, topic suggestions, or any other AI-powered features.

Liability is limited to cases of intent and gross negligence. In cases of slight negligence, liability is limited to the breach of material contractual obligations (Kardinalpflichten) and capped at the amount of fees paid in the 12 months preceding the event giving rise to liability.

The above limitations do not apply to liability for damages arising from injury to life, body, or health.

§ 7 Termination & Data Deletion

Users may delete their account and all associated data at any time through the account settings.

The provider reserves the right to terminate accounts that violate these Terms, applicable law, or the rights of third parties, after prior notice where feasible.

Upon termination, all user data will be permanently deleted within 30 days, unless retention is required by law.

§ 8 Amendments

Ambralia reserves the right to amend these Terms. Users will be notified of changes at least 30 days in advance via email or in-app notification.

Continued use of the Service after the effective date of the amended Terms constitutes acceptance.

§ 9 Applicable Law & Jurisdiction

These Terms are governed by the laws of the Federal Republic of Germany.

For consumers within the EU, mandatory consumer protection provisions of the consumer's country of residence apply where they provide greater protection.