Terms of Service

1. Scope

These terms govern the use of courses.graphwiz.ai ("CertPrep"), operated by Tobias Weiss IT-Services. By using the platform you agree to these terms.

2. Service

CertPrep offers free study guides, practice exams and optional paid subscriptions. Paid subscriptions renew until cancelled. The practice content is provided for exam preparation purposes; we do not guarantee exam results.

3. Subscriptions

Subscriptions are billed monthly at the price shown on the store page at the time of purchase and renew automatically until cancelled. You can cancel at any time via the account portal or by email; the subscription then ends at the end of the current billing period. All prices are as displayed on the store page.

4. Payments, Refunds & Withdrawal

Payments are processed by Stripe. Consumers have a statutory 14-day withdrawal right. Because the practice subscription is a digital service that you access immediately, this right expires once the service begins. By clicking "Subscribe" you expressly consent to the immediate start of the service and acknowledge that you thereby lose the statutory 14-day withdrawal right (Art. 16 lit. m Directive 2011/83/EU; § 356 (5) BGB). As an additional, customer-friendly policy we nevertheless offer a 30-day money-back guarantee.

5. Acceptable use

You may not scrape, redistribute or resell the content of this platform. Accounts must not be shared in a way that circumvents subscription limits.

6. Liability

The content is provided "as is" without warranties. Liability for damages is limited to intent and gross negligence, except for statutory mandatory liability.

7. Certification & Exam (Rust-Zertifizierung)

The Rust certification (249 €, one-time) is a paid, server-graded exam: 40 questions, 60 minutes, pass mark 70 %. It is administered on an honor-system basis without proctoring — no automated or human supervision. Passing requires the correct answers; the certificate is granted if and only if the server-side grade reaches 70 %.

Each purchase grants one exam attempt (a new attempt requires a new purchase). The certificate is a course-internal credential; it does not replace or represent a formal, recognised professional qualification. Issued certificates are publicly verifiable by their code at /rust/verify/[code]. Failed attempts are assessed on-screen; they are reported for feedback but are not used for cheating detection.

Because the exam is a digital service delivered immediately, clicking "Pay" constitutes consent to its immediate start and the statutory 14-day withdrawal right expires once you begin the exam (§ 356 (5) BGB; Art. 16 lit. m Directive 2011/83/EU).

8. Contact

Tobias Weiss IT-Services, Grundstraße 69, 78628 Rottweil, Germany · spam@tobias-weiss.org