Terms of Use

LeanLab (“LeanLab,” “we,” “us,” or “our”) is a personal body-recomposition tracker available at leanlab.dev and as an installable Progressive Web App. These Terms of Use (the “Terms”) govern your access to and use of LeanLab.

By creating an account, signing in, or otherwise using LeanLab, you agree to these Terms and to our Privacy Policy. If you do not agree, do not use the Services.

LeanLab is a tracking and calculation tool, not a provider of medical, nutritional, or healthcare advice. Everything LeanLab shows you — calorie targets, macro splits, training plans, time-to-goal projections, diet-break suggestions — is generated automatically from standard mathematical formulas applied to the numbers you enter. These are general estimates, not personalised professional advice.

LeanLab does not diagnose, treat, cure, or prevent any condition. It is not a substitute for the advice of a physician, registered dietitian, or other qualified health professional. Never disregard professional advice, or delay seeking it, because of something LeanLab calculated.

You should consult a qualified professional before beginning any diet, fasting, calorie deficit, supplementation, or exercise programme — and you must do so if you are pregnant or breastfeeding, have or suspect an eating disorder, or have any cardiovascular, metabolic, renal, or other medical condition.

You are solely and entirely responsible for all decisions you make about your own body, diet, training, and health, and for any consequences of those decisions. LeanLab only presents recommendations based on formulas and the data you provide; the choice to act on them — and how — is always yours.

You are responsible for entering accurate data and for using your judgement. If a target or recommendation feels wrong, unsafe, or extreme for you, do not follow it. Listen to your body and seek professional guidance.

LeanLab’s outputs are mathematical estimates derived from population-level equations (for example, energy-expenditure and macronutrient formulas) and the inputs you give. They are necessarily approximate. Real-world results depend on countless individual factors LeanLab cannot measure.

We make no warranty or guarantee that you will reach any particular weight, body-fat percentage, appearance, or result, or that you will do so within any projected timeline. Projections and “time-to-goal” figures are illustrative only.

You must be at least 18 years old and capable of forming a binding contract to use LeanLab. Sign-up is open, but an account becomes usable only after you confirm your email address.

You are responsible for the activity on your account and for keeping access to your email (used for passwordless sign-in) secure. Provide accurate information and keep it current. Do not impersonate others or create accounts for anyone under 18.

You agree not to:

• use LeanLab for anything unlawful or in breach of these Terms;
• attempt to access accounts or data that are not yours, or probe, scan, or test the security of the Services;
• disrupt, overload, or interfere with the Services, or attempt to circumvent rate limits, bot protection, or authentication;
• copy, scrape, reverse-engineer, or build a competing product from the Services except as permitted by law.

The body-recomposition data you log is yours. How we handle it is described in our Privacy Policy. You can view, export, and delete your data at any time from the Account screen in Settings.

You are responsible for the accuracy of what you enter. Some of what you log (for example body measurements or body-fat estimates) may be health-related; you choose to record it, for yourself.

LeanLab, its name, logo, design, methodology presentation, and software are owned by us and protected by intellectual-property law. We grant you a personal, non-exclusive, non-transferable, revocable licence to use LeanLab for your own personal tracking. No other rights are granted.

LeanLab is provided on an “as is” and “as available” basis. We may change, suspend, or discontinue any part of the Services at any time, and we do not promise uninterrupted or error-free operation. We may update these Terms; material changes will be reflected by the “last updated” date above, and your continued use after a change means you accept the updated Terms.

To the maximum extent permitted by applicable law, LeanLab is provided without warranties of any kind, whether express or implied, including fitness for a particular purpose and accuracy of any estimate or recommendation.

To the maximum extent permitted by law, LeanLab and its operator shall not be liable for any injury, illness, health outcome, loss, or damage of any kind arising from or related to your use of the Services or your reliance on any estimate, target, or recommendation they produce. You use LeanLab at your own risk.

Nothing in these Terms limits any liability that cannot be limited under applicable mandatory law — including, for consumers in Norway and the EEA, rights that cannot be waived. The limitations above apply only to the extent the law permits.

These Terms are governed by the laws of Norway. If you are a consumer, you also benefit from any mandatory protections of the law of the country where you live, and nothing here removes those rights.

As a Norwegian consumer service, your statutory rights are protected by Norwegian law and overseen by bodies such as the Norwegian Consumer Authority (Forbrukertilsynet) for consumer-protection matters and the Norwegian Data Protection Authority (Datatilsynet) for data-protection matters. You may contact Forbrukertilsynet about consumer disputes, and Datatilsynet (see our Privacy Policy) about how your personal data is handled.

We’d always rather resolve issues directly first — please contact us before pursuing a formal dispute.

Questions about these Terms? Reach us through the contact option in Settings, or by replying to any LeanLab email. We aim to respond within 30 days.