General Terms and Conditions (GTC)

As of: February 2026

Section 1 – Scope and Provider

(1) These General Terms and Conditions (hereinafter "GTC") apply to all contracts concluded via the online store at store.juergenkoller.software (hereinafter "Store") between

Jürgen Koller Software GmbH
Wilhelmstr. 5
74072 Heilbronn
Germany
Email: info@juergenkoller.software
Phone: +49 7131 9244166
Commercial Register: HRB 765195, Stuttgart District Court
Managing Director: Jürgen Koller

(hereinafter "Provider") and the customer (hereinafter "Customer").

(2) These GTC apply to both consumers and business customers, unless expressly stated otherwise. A consumer within the meaning of Section 13 of the German Civil Code (BGB) is any natural person who enters into a legal transaction for purposes that are predominantly neither attributable to their commercial nor their independent professional activity.

(3) Deviating or supplementary terms and conditions of the Customer shall not become part of the contract unless the Provider expressly agrees to their validity in writing.

Section 2 – Subject Matter

(1) The subject matter of contracts concluded via the Store is the provision of digital products within the meaning of Sections 327 et seq. BGB, in particular software applications (hereinafter "Apps") for the macOS and iOS operating systems.

(2) The Store offers both free and paid Apps. The essential characteristics, functionalities, and system requirements (compatibility and interoperability) of each App are described in the product description in the Store.

(3) For Apps distributed via the Apple App Store, Apple Inc.'s terms of use additionally apply.

Section 3 – Conclusion of Contract

(1) The presentation of Apps in the Store does not constitute a binding offer but an invitation to submit an offer (invitatio ad offerendum).

(2) Paid Apps: By clicking the "Buy Now" button, the Customer submits a binding offer to purchase. The contract is concluded when the Provider accepts the offer by sending a confirmation email or initiates the provision of the digital product.

(3) Free Apps: For free Apps, the usage contract is concluded upon download or redirection to the Apple App Store.

(4) Registration: Where registration for a user account is required, a usage contract for the account functions is concluded upon completion of registration. The Customer is obligated to provide truthful information and to keep their access credentials confidential.

(5) The contract text is not stored by the Provider after conclusion of the contract and is no longer accessible to the Customer after completion of the order process. The Customer may print or electronically save the contract content before submitting the order.

(6) Technical steps for contract conclusion: The ordering process for paid Apps comprises the following steps:

1. Selection of the desired App and clicking "Add to Cart"
2. Review of the shopping cart (option to modify or remove products)
3. Clicking "Proceed to Checkout" and, if applicable, logging in or registering
4. Entering and reviewing payment information
5. Binding order by clicking the "Buy Now" button

(7) Correction options: The Customer may review and correct their entries at any time before submitting the binding order. Products may be removed from the shopping cart or quantities may be changed. Data entered during the order process may be corrected using standard keyboard and mouse functions until the order process is completed by clicking "Buy Now".

Section 4 – Prices and Payment

(1) All prices listed in the Store are in euros and are final prices including the applicable statutory value-added tax.

(2) Payment is processed via the payment service provider Stripe. The available payment methods are displayed to the Customer during the order process.

(3) The purchase price is due immediately upon placing the order.

(4) The Provider reserves the right to change prices for products not yet ordered at any time. For orders already placed, the price displayed at the time of the order applies.

Section 5 – Provision of Digital Products

(1) The provision of digital products takes place via one of the following methods, depending on the App:

• Direct download: Via a download link in the Store.
• Apple App Store: Via redirection to the Apple App Store (iOS) or Mac App Store (macOS).

(2) Provision takes place without undue delay after conclusion of the contract; for paid Apps, after receipt of payment.

(3) For Apps provided via the Apple App Store, the Provider assumes no responsibility for the availability or technical functionality of the Apple App Store.

Section 6 – Usage Rights and License

(1) Upon provision of the App, the Provider grants the Customer a simple (non-exclusive), perpetual right to use the software.

(2) The right of use includes the installation and use of the App on devices used by the Customer for private and commercial purposes, unless the product description provides otherwise.

(3) The Customer is not entitled to reproduce the App (beyond its intended use), decompile, disassemble, or otherwise reverse-engineer the source code, unless expressly permitted by law (Sections 69d, 69e of the German Copyright Act).

(4) Transfer of the software to third parties is only permitted together with the complete transfer of all usage rights and the complete cessation of the Customer's own use.

Section 7 – Right of Withdrawal

Withdrawal Policy

(1) Right of withdrawal: Consumers have the right to withdraw from this contract within fourteen days without giving any reason. The withdrawal period is fourteen days from the day of conclusion of the contract.

To exercise your right of withdrawal, you must inform us

Jürgen Koller Software GmbH
Wilhelmstr. 5, 74072 Heilbronn, Germany
Email: support@juergenkoller.software

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

To meet the withdrawal deadline, it is sufficient that you send the notification of the exercise of the right of withdrawal before the withdrawal period expires.

(2) Consequences of withdrawal: If you withdraw from this contract, we shall reimburse all payments we have received from you without undue delay and no later than fourteen days from the day on which we received notification of your withdrawal from this contract. We shall use the same means of payment for the reimbursement that you used for the original transaction, unless expressly agreed otherwise with you.

Premature Expiry of the Right of Withdrawal for Digital Content

(3) The right of withdrawal expires prematurely if the Provider has begun to perform the contract (provision of the digital content) after the Customer

• has expressly consented to the Provider beginning performance of the contract before the expiry of the withdrawal period, and
• has confirmed their awareness that they lose their right of withdrawal by consenting to the commencement of performance of the contract (Section 356(5) BGB).

(4) There is no right of withdrawal for free Apps, as no paid contract exists.

Model Withdrawal Form

(If you wish to withdraw from the contract, please fill out this form and send it back.)

Section 8 – Warranty and Updates

(1) The statutory warranty rights pursuant to Sections 327d et seq. BGB for contracts on digital products apply.

(2) The Provider warrants that the App at the time of provision meets the subjective (contractually agreed) and objective (usually expected) requirements and is free from material and legal defects.

(3) Reversal of burden of proof: If a defect becomes apparent within twelve months of provision, it is presumed that the defect already existed at the time of provision (Section 327l BGB), unless this presumption is incompatible with the nature of the digital product or the defect.

(4) Update obligation (Section 327f BGB): The Provider shall provide the Customer with updates (in particular security updates) necessary to maintain the contractual conformity of the digital product. The Customer will be informed of available updates. If the Customer fails to install an update provided, the Provider shall not be liable for defects solely attributable to the missing update, provided the Customer was duly informed of the update and its consequences.

(5) The warranty rights of the Customer cannot be restricted vis-à-vis consumers by GTC (Section 327s BGB).

Section 9 – Limitation of Liability

(1) The Provider shall be liable without limitation for damages arising from injury to life, body, or health based on an intentional or negligent breach of duty by the Provider or its legal representatives or vicarious agents.

(2) The Provider shall be liable without limitation for other damages based on an intentional or grossly negligent breach of duty by the Provider or its legal representatives or vicarious agents.

(3) In the event of a slightly negligent breach of material contractual obligations (cardinal obligations), the Provider's liability is limited to the foreseeable, contract-typical damage. Material contractual obligations are those whose fulfillment is essential for the proper performance of the contract and on whose compliance the Customer may regularly rely.

(4) Otherwise, the Provider's liability for damages caused by slight negligence is excluded.

(5) The above limitations of liability do not apply to claims under the Product Liability Act or in the case of an assumed guarantee.

Section 10 – Data Protection

For information on the processing of personal data, please refer to our Privacy Policy.

Section 11 – Final Provisions

(1) The law of the Federal Republic of Germany applies, excluding the UN Convention on Contracts for the International Sale of Goods (CISG). If the Customer is a consumer, the mandatory consumer protection provisions of the state in which the Customer has their habitual residence shall remain unaffected.

(2) If the Customer is a merchant, a legal entity under public law, or a special fund under public law, the place of jurisdiction is Heilbronn.

(3) The European Commission provides a platform for online dispute resolution (ODR): https://ec.europa.eu/consumers/odr. The Provider is neither obligated nor willing to participate in dispute resolution proceedings before a consumer arbitration board.

(4) Should individual provisions of these GTC be or become invalid or unenforceable, the validity of the remaining provisions shall remain unaffected.

(5) The contractual language is German.