General Terms and Conditions

The German version is authoritative. Deutsch

1. Provider and contractual partner

NixStein is offered by Victor von Rautenberg, Pfarrer-Theile-Str. 97, 13591 Berlin, Germany, email: admin@ai-design-thinking.de. He is also your contractual partner for all purchases.

2. Scope

These terms apply to the use of the app and the website and to all purchases in the app.

3. Minimum age

NixStein may be used by anyone who is at least 16 years old.

4. Account and names

To use it, you need an account with a confirmed email address. Your details must be accurate. Keep your access credentials secret.

Names for yourself and for your stones must not be offensive, unlawful or misleading and must not infringe the names, trade marks or other rights of third parties. Keeper names are visible to later keepers of a stone. We may remove or replace impermissible names and, in the event of serious or repeated violations, block an account.

5. Services

Download and use are initially free of charge. The trial period is 28 days from the first adoption. After that, you complete the adoption with a purchase (one-off €1.99, with three eyes); otherwise the stone is placed in safekeeping behind glass. Eyes, additional stones and gifts can be purchased in addition. There is no subscription.

6. Prices

The prices displayed in the app and on the payment page apply. All prices are final prices. In accordance with § 19 UStG (German VAT Act), no value added tax is charged.

7. Conclusion of contract

If you select a product in the app, you will be taken to the payment page of our payment service provider Stripe. There you can see the product and price and can check and correct your entries. Above the button it says: “By clicking ‘Pay’ you place an order with an obligation to pay.” By clicking “Pay” you submit a binding order; the contract is concluded upon successful payment. We do not store the contract text separately: you can access and save these terms at any time on this page, and you will receive confirmation of your order by email.

The contract language is German; the app and these terms are additionally available in other languages, and the German version prevails.

8. Payment

Payment is processed by Stripe Payments Europe Ltd., 1 Grand Canal Street Lower, Dublin 2, Ireland. Depending on what is offered on the payment page, you can pay by card, PayPal, Apple Pay, Google Pay or Klarna. You will receive the receipt by email from Stripe.

9. Delivery

The digital content purchased is unlocked in the app immediately after successful payment.

10. Right of withdrawal

As a consumer, you have a statutory right of withdrawal. Details and the model withdrawal form can be found in the Withdrawal Information.

You can also declare the withdrawal using the “Withdraw from contract” button. You will find it in the footer of every page, in the Withdrawal Information and in the app (Settings).

The right of withdrawal expires early if, before the purchase, you have expressly consented to our beginning performance of the contract before the withdrawal period has expired and have acknowledged that you thereby lose your right of withdrawal (§ 356(5) BGB (German Civil Code)). The app obtains this consent before the purchase.

11. Digital content and defects

NixStein provides digital content with the functions described in the app and on the website. There is no entitlement to further functions. Eyes purchased belong to the stone and pass with it to the new keeper when it is swapped; the unlocking remains with you.

In the event of defects, the statutory rights for digital products apply (§§ 327 et seq. BGB).

Your stone does nothing – that is the agreed quality.

12. Availability and changes

We endeavour to ensure trouble-free operation but cannot guarantee permanent availability of the servers. We may further develop the app and change functions insofar as this is reasonable for you; § 327r BGB remains unaffected.

13. Liability

We are liable without limitation in cases of intent and gross negligence, for injury to life, body or health, and under the Product Liability Act (Produkthaftungsgesetz). In cases of slight negligence, we are liable only for the breach of essential contractual obligations, that is, obligations whose fulfilment is a prerequisite for the proper performance of the contract in the first place and on whose observance you may regularly rely; in this case, liability is limited to the foreseeable damage typical for this type of contract. In all other respects, liability is excluded.

14. Termination

You can end your use at any time by deleting your account in the app. We may terminate the contract for good cause, in particular in the event of serious violations of these terms.

15. Dispute resolution

We are neither willing nor obliged to participate in dispute resolution proceedings before a consumer arbitration board.

16. Applicable law

German law applies. If you are a consumer, the mandatory consumer protection provisions of the state in which you have your habitual residence remain unaffected.

Last updated: 15.10.2026