These General Terms and Conditions (GTC) apply to all contracts between
Kristian Hoffmann
Karl-Kraut-Straße 15
30177 Hannover
E-Mail: moin [at] kristianhoffmann.de
– hereinafter "Provider" – and the user of the LactateThreshold platform – hereinafter "Customer" – in their version valid at the time of order.
The provider provides a web-based application for analyzing lactate test data. The services include:
The calculated values are based on scientifically sound mathematical models and serve exclusively for training and information purposes.
The contract is concluded by registering a user account. For paid subscriptions, the contract is concluded by completing the payment process via Stripe.
Premium Athlete: €19.99 per year (incl. VAT)
Premium Coach: €49.99 per year (incl. VAT)
Payment is made via the payment service provider Stripe. Accepted payment methods: Credit card (Visa, Mastercard, American Express).
Right of Withdrawal
You 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 contract conclusion.
To exercise your right of withdrawal, you must inform us
Kristian Hoffmann
Karl-Kraut-Straße 15, 30177 Hannover
Email: moin [at] kristianhoffmann.de
Phone: 0151 15538987
by means of a clear statement (e.g., a letter sent by post or email) of your decision to withdraw from this contract.
Consequences of Withdrawal
If you withdraw from this contract, we shall reimburse you all payments received from you without undue delay and not later than fourteen days from the day on which we are informed about your decision to withdraw from this contract. We will use the same means of payment as you used for the original transaction for this reimbursement.
Special Note
Your right of withdrawal expires prematurely if we have begun to execute the contract after you have expressly agreed that we should begin to execute the contract before the withdrawal period expires, and you have confirmed your knowledge that you will lose your right of withdrawal by your consent when execution of the contract begins.
The subscription has a term of one year and automatically renews for another year if it is not cancelled at least one day before the end of the respective term.
Cancellation can be made at any time:
Upon cancellation, access remains until the end of the paid term.
The use of the app and the implementation of training recommendations are at the user's own risk.
The provider is liable without limitation for damages resulting from injury to life, body or health as well as for damages caused intentionally or by gross negligence.
For damages caused by slight negligence, the provider is only liable in case of violation of essential contractual obligations, limited in amount to the foreseeable, typically occurring damage.
The law of the Federal Republic of Germany applies, excluding the UN Sales Law. For consumers, this choice of law applies only insofar as the protection granted is not withdrawn by mandatory provisions of the law of the state in which the consumer has his habitual residence.
Last updated: January 2026
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