Privacy Policy

This Privacy Policy explains how LebenKraft (“we,” “us,” or “our”) collects, uses, and protects your information when you use the LebenKraft website and applications (the “Service”). Transparency is central to how we build LebenKraft, and that extends to your data.

We collect only what we need to run the Service:

• Account information — your email address, first name, and authentication details, managed through our authentication provider.
• Training profile — the goals, experience, schedule, equipment, and limitations you enter during onboarding.
• Training data — the workouts, sets, weights, and reps you log, and the recovery/readiness check-ins you complete. Some of this is health-related information, and we treat it accordingly.
• Coach conversations — the messages you send to the AI coach and its responses.
• Payment information — if you subscribe, our payment processor (Stripe) collects and processes your payment details. We do not receive or store your full card number.
• Usage and device data — basic technical information (such as log data) needed to operate, secure, and troubleshoot the Service.

We use your information to:

• generate and adapt your training program, progression, and recovery guidance;
• provide the AI coach and explain the Service’s recommendations;
• process your subscription and payments;
• secure the Service, prevent abuse, and provide support;
• communicate with you about your account and the Service.

We do not sell your personal information, and we do not use it for third-party advertising.

The Service’s core training decisions are made by our own deterministic engines. When you use the AI coach, the messages you send — along with limited training context needed to answer well (for example, your recent training summary and recovery status) — are sent to our AI provider, Anthropic, to generate a response.

We instruct our AI provider to process this data only to return responses to you. We do not authorize your conversations to be used to train third-party AI models.

We share information with a small set of trusted service providers who process it on our behalf, under contract, solely to run the Service:

• Supabase — authentication and database hosting for your account and training data.
• Vercel — application hosting and delivery.
• Stripe — payment processing for subscriptions.
• Anthropic — AI processing for the coach feature.

We may also disclose information if required by law, to protect our rights or users’ safety, or in connection with a business transfer. We do not sell your data.

We use essential cookies to keep you signed in and to operate the Service securely. We also use your device’s local storage to hold your in-progress workout and preferences so the app works smoothly and offline. We do not use advertising or cross-site tracking cookies.

We keep your information for as long as your account is active or as needed to provide the Service. If you delete your account, we delete or de-identify your personal data within a reasonable period, except where we must retain certain records (for example, transaction records) to comply with legal obligations.

You can access and update your profile in the app, cancel your subscription from your billing settings, and request a copy or deletion of your data. Depending on where you live, you may have additional rights (such as access, correction, deletion, portability, or objection) under laws like the GDPR or CCPA.

To exercise any of these rights, email privacy@lebenkraft.com. We will respond as required by applicable law.

We use industry-standard measures — including encryption in transit and access controls — to protect your information. No method of transmission or storage is completely secure, so we cannot guarantee absolute security, but we work to protect your data and to notify you as required if a breach affects it.

Our providers may process and store data in countries other than yours, including the United States. Where required, we rely on appropriate safeguards for such transfers. By using the Service, you understand your information may be processed in these locations.

The Service is not directed to individuals under 18, and we do not knowingly collect personal information from them. If you believe a minor has provided us information, contact us and we will delete it.

We may update this Privacy Policy from time to time. When we make material changes, we will update the “Last updated” date and, where appropriate, notify you. Your continued use of the Service after changes take effect constitutes acceptance of the updated policy.

Questions about your privacy or this policy? Email privacy@lebenkraft.com.