1. Scope and Provider

These Terms of Service (ToS) govern the contractual relationship between Dr. med. Christian Kirsch (hereinafter “Provider”) and users of the EchoMastery Pro web application and mobile app. These terms are subject to the laws of the Federal Republic of Germany.

2. Medical Disclaimer (Essential)

EchoMastery Pro provides educational content and clinical calculators for informational purposes only. It does not constitute medical advice, diagnosis, or treatment. The use of clinical tools within the service does not replace the professional judgment of a qualified healthcare provider.

3. Right of Withdrawal (B2C Consumers)

If you are a consumer (a natural person entering into a contract for purposes mostly outside of their trade, business, or profession), you have a statutory 14-day right of withdrawal.

Withdrawal Period: You may withdraw from this contract within 14 days without giving any reason.

Electronic Withdrawal Button: Starting June 19, 2026, you may exercise this right via the “Withdraw from Contract” button located in our website footer or account settings. This function is available without a login requirement.

Process: Clicking the withdrawal button will lead to a confirmation page; the withdrawal is legally effective once you click the final “Confirm Withdrawal” button. We will immediately confirm receipt via email.

4. Limitation of Liability (German BGB Standards)

The Provider’s liability is limited as follows:

Unlimited Liability: The Provider is liable without limitation for intent, gross negligence, and for injury to life, body, or health.
Essential Obligations: In the event of a slightly negligent breach of an obligation that is essential for achieving the purpose of the contract (Kardinalpflichten), liability is limited to foreseeable, typically occurring damages.
Other Cases: Liability for simple negligence is otherwise excluded.

5. Billing Channels

Subscription purchases made in the iOS App Store version of EchoMastery Pro are processed through Apple In-App Purchase. Subscription purchases on the web application and Android builds are processed through Stripe.

6. Subscriptions

EchoMastery Pro offers one auto-renewing subscription product: EchoMastery Pro Monthly. The current price is shown on the checkout screen and on the pricing page before you subscribe.

Billing interval: The subscription renews automatically every month until canceled.
Auto-renewal: Your payment method (Apple ID or Stripe, depending on platform) is charged automatically at the start of each billing period unless you cancel at least 24 hours before the renewal date.
Cancellation — iOS App Store subscribers: Manage or cancel your subscription in iOS Settings → [your name] → Subscriptions, or see Apple’s subscription cancellation instructions. Canceling does not refund the current billing period.
Cancellation — web/Android (Stripe) subscribers: Cancel anytime from Account & Billing inside the app, or see Google Play’s subscription help if purchased through Android. Canceling stops future renewals but does not refund the current billing period.

See our Privacy Policy for how subscription and payment data is handled, and Section 3 above for your statutory EU right of withdrawal.

7. Dispute Resolution

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.