Terms of Service

1. Description of services

Rookion ("the Service") is an AI-powered chess coaching platform operated by AI Solution Lab ("we", "us", "our"). The Service lets you play chess against an AI opponent, receive AI-powered coaching and analysis of your games, and access personalized training features.

2. Account requirements

To use the Service, you must:

• •Be at least 16 years old
• •Provide accurate and complete registration information
• •Keep your login credentials secure
• •Notify us without undue delay of any unauthorized use of your account

You are responsible for all activities that take place under your account.

3. Subscriptions and billing

• •Free tier: Basic access to the Service at no charge, with usage limits
• •Pro: Extended feature set, €19.90 per month or €199.90 per year.
• •Pro+: in preparation, not yet bookable. Planned full feature set at €49.00 per month or €499.90 per year; binding only upon release.
• •Founder (founding member): Discounted introductory window, permanently €9.90 per month or €99.90 per year. The Founder price is below the regular Pro price and is retained for the duration of the existing Founder subscription. It applies exclusively to that existing subscription; once it ends (e.g. through cancellation), the Founder price cannot be claimed again for a later new subscription, and the then-regular price applies.
• •Billing: Billing takes place at the beginning of each billing period via Stripe. All prices stated are final prices; pursuant to Section 19 of the German VAT Act (UStG), no value-added tax is shown.
• •Free trial: (1) The subscription starts with a free trial of 7 days. (2) Unless cancelled before the trial ends, it automatically converts into a paid subscription (monthly or yearly plan at the price shown at checkout for the selected plan). The first payment becomes due when the trial ends; the exact amount and due date are stated at checkout. (3) For SEPA direct debit payments, the amount and due date communicated at contract conclusion serve as the pre-notification; the notification period is shortened by mutual agreement. (4) During the trial you can cancel at any time free of charge via our cancellation form or informally by e-mail to info@rookion.de; in that case nothing is charged. (5) The free trial is granted only once per customer.
• •Term and renewal: The initial term is one month or one year, depending on your choice. After the initial term ends, the subscription continues for an indefinite period and can be cancelled by you at any time with a notice period of no more than one month. There is no rigid renewal for a further fixed term (such as another year). If you have paid in advance for a period that extends beyond the effective date of the cancellation, we refund the portion attributable to the unused remaining time. Billing via Stripe continues per billing period (monthly or yearly).
• •Cancellation: You can cancel your subscription at any time via our cancellation form (cancellation button in the footer) or informally by email to info@rookion.de. For a monthly term, access continues until the end of the current billing period; otherwise the above provisions on term, notice period and pro-rata refund apply.
• •Price changes: We will inform you of price changes at least 30 days in advance.

4. Permitted use

You agree not to:

• •Use the Service for unlawful purposes
• •Reverse-engineer, decompile or disassemble parts of the Service
• •Use the coaching chat for abuse, harassment or harmful content
• •Gain unauthorized access to other users' accounts or our systems
• •Use automated systems or bots for unauthorized access to the Service
• •Resell, redistribute or commercially exploit the Service without our written consent

We reserve the right to suspend or delete accounts that violate these terms.

5. AI coaching disclaimer

6. Intellectual property

The Service, including its design, code, AI models and content, is the property of AI Solution Lab and is protected by intellectual property laws. You retain ownership of your game data and coaching conversations. By using the Service, you grant us a license to use your game data to provide and improve the coaching service.

7. Limitation of liability

AI Solution Lab is liable without limitation for damages arising from injury to life, body or health that are based on a negligent or intentional breach of duty by us, our legal representatives or vicarious agents, as well as for damages based on intent or gross negligence. Liability under the German Product Liability Act (Produkthaftungsgesetz) and arising from a guarantee assumed by us also remains unaffected.

In the event of a slightly negligent breach of a material contractual obligation (cardinal obligation, i.e. an obligation whose fulfillment makes the proper performance of the contract possible in the first place and on whose compliance you may regularly rely), our liability is limited to the foreseeable damage typical for this type of contract.

Any further liability of AI Solution Lab is excluded. The foregoing limitations of liability do not entail any change in the statutory burden of proof to your detriment.

8. Service availability

We strive to ensure high availability but do not guarantee uninterrupted access to the Service. We may temporarily interrupt the Service for maintenance, updates or in the event of technical problems. We reserve the right to modify or discontinue features with reasonable prior notice.

9. Communication & consent

By creating an account, you consent to receiving service-related emails (e.g. password resets, subscription confirmations, important service updates). These are necessary for the provision of the Service and do not require separate consent.

Marketing communication (chess tips, product updates, offers) is sent only with your express consent (opt-in). You can withdraw this consent at any time in your account settings or by contacting us. We log consent actions with timestamps and technical metadata (IP address, browser) in order to comply with our legal obligations under Article 5(2) GDPR.

10. Right of withdrawal (paid subscriptions)

11. Termination

Ordinary cancellation of the subscription: You can cancel your paid subscription at any time (see Section 3). Access to the paid features continues until the cancellation takes effect; remaining periods paid in advance are refunded on a pro-rata basis. Your free account remains unaffected.

Closing your account: You can close your account at any time by contacting us at info@rookion.de. Upon closing the account, your right to use the Service ends; the deletion of your data is governed by our Privacy Policy.

Suspension or termination for cause: We may suspend or terminate your access to the Service for good cause, in particular in the event of significant breaches of contract, abuse, security risks or payment default. In this case your right to use the Service ends immediately.

12. Governing law

These terms of use are governed by the law of the Federal Republic of Germany, excluding its conflict-of-laws rules and the UN Convention on Contracts for the International Sale of Goods. If you are a consumer, this choice of law applies only insofar as it does not restrict mandatory consumer protection provisions of the state in which you have your habitual residence. For consumers, the statutory places of jurisdiction apply; an exclusive place of jurisdiction at our registered office exists only if you are a merchant, a legal entity under public law or a special fund under public law, or if you have no general place of jurisdiction in Germany.

13. Changes to these terms of use

We may adjust these terms of use if there is an objective reason to do so, such as a change in the legal situation or in the highest-court case law, a technical further development of the Service or an extension of our range of services. We will inform registered users of material changes at least 30 days before they take effect in text form (e.g. by email), separately pointing out the changes, the date of entry into force as well as your right to object and your special right of termination. If you do not object to the changes within 30 days of receiving the notice, they are deemed accepted; we will point this out to you separately in the notice. If you object, both you and we may terminate the contract as of the planned date of entry into force; until then, the previous terms continue to apply. Material changes to the scope of services and increases in the fee always require your express consent and are not deemed given by mere silence or continued use of the Service.

14. Severability clause

Should individual provisions of these terms of use be or become invalid or unenforceable in whole or in part, the validity of the remaining provisions remains unaffected. The invalid or unenforceable provision is replaced by the statutory provisions (Section 306 of the German Civil Code, BGB).

15. Contact

If you have questions about these terms of use, please contact us: