Terms of Use

Welcome to LifeByLogic. By accessing or using lifebylogic.com (the "Site") or any of its tools, calculators, content, or services (collectively, the "Service"), you agree to be bound by these Terms of Use ("Terms"). If you do not agree, do not use the Service.

These Terms apply to all visitors, users, and others who access the Service. They form a legal agreement between you and LifeByLogic ("we," "us," or "our").

LifeByLogic is an independent publication of interactive tools, calculators, simulators, and editorial content across neuroscience, decision science, behavioral economics, and personal analytics. The Service is provided free of charge for personal, non-commercial use.

We reserve the right to modify, suspend, or discontinue any part of the Service at any time, with or without notice. We are not liable to you or any third party for any such modifications.

Subject to these Terms, we grant you a limited, non-exclusive, non-transferable, revocable license to access and use the Service for your personal, non-commercial purposes.

You may share links to individual pages and tools. You may cite our methodology in academic, journalistic, or personal work with appropriate attribution to LifeByLogic. You may not republish substantial portions of the Site's content without prior written permission.

You agree not to:

• Use the Service for any unlawful purpose or in violation of these Terms.
• Attempt to gain unauthorized access to any part of the Service, other accounts, or connected systems.
• Scrape, crawl, or use automated tools to systematically download content or data, except as expressly permitted by our robots.txt file.
• Reverse engineer, decompile, or attempt to extract the source code of our tools beyond what is visible in the browser's standard developer tools.
• Reproduce, duplicate, copy, sell, resell, or exploit any portion of the Service without prior written permission.
• Introduce viruses, trojans, worms, or any other malicious code intended to damage the Service or any other user's device.
• Remove, obscure, or alter any copyright notices, trademarks, or proprietary rights notices on the Site.

We explicitly do permit access by legitimate AI crawlers (GPTBot, ClaudeBot, PerplexityBot, Google-Extended, and similar). Our robots.txt file reflects current permissions.

This is the most important section. Please read it carefully.

The tools on this Site — including the Brain Age Index, Sleep-Cognition Optimizer, and all other calculators and simulators — are educational tools. They are designed to help you understand evidence-based research and apply it to your own situation for learning purposes.

If you have concerns about your health, mental state, legal situation, or financial future, consult a qualified professional. Do not disregard professional advice or delay seeking it based on something you read or calculated on this Site.

Individual results will vary. The tools produce estimates based on published population-level research and your self-reported inputs. They cannot account for your complete medical history, genetics, context, or circumstances.

In case of medical emergency, call your local emergency number or go to the nearest emergency room. In case of mental-health crisis, contact a crisis helpline in your country.

The Service and its original content — including text, tool designs, methodology documents, calculation algorithms, typography choices, graphics, and visual design — are owned by LifeByLogic or its licensors and are protected by copyright, trademark, and other intellectual property laws.

The "LifeByLogic" name and logo are trademarks of LifeByLogic. The methodology identifiers — including LBL-BAI (Brain Age Index), LBL-SCO (Sleep-Cognition Optimizer), LBL-QS (Quit Score), LBL-BD (Bias Detector), LBL-LS (Life Score), and any future LBL-prefixed methodology names — are identifiers of our published methodologies.

The research cited within our tools — peer-reviewed studies, psychometric instruments, published frameworks — belongs to the respective authors and publishers. We cite these sources with attribution and claim no ownership over them.

You retain full ownership of any data you input into the tools. Because this data never leaves your browser, we never acquire any rights to it.

If you voluntarily subscribe to The Logic Letter or any future newsletter, you authorize us to send you email communications related to the Service. You can unsubscribe at any time using the link in every email. We will process any unsubscribe request within 72 hours.

We do not send unsolicited promotional emails. We do not share your email address with third parties for marketing purposes.

The Service may contain links to third-party websites or references to third-party services (such as research journals, academic databases, or partner institutions). We do not control these third parties and are not responsible for their content, policies, or practices.

When you access a third-party site or service, you do so at your own risk. We encourage you to review the privacy policies and terms of any third party before providing any information or engaging with its content.

We do not warrant that the Service will be uninterrupted, timely, secure, or error-free. We do not warrant the accuracy, completeness, or usefulness of any information obtained through the Service. Scientific research evolves; our methodology reflects our best understanding at the time of publication and may be updated as new research emerges.

Calculations produced by our tools are estimates, not diagnoses or predictions. Your actual health, cognitive function, financial outcomes, life outcomes, or decision outcomes will be shaped by many factors the tools cannot measure.

In no event will our total cumulative liability exceed one hundred United States dollars ($100), or the amount you have paid us in the past twelve months (whichever is greater). Because the Service is free of charge, in practice this means our liability is limited to $100.

Some jurisdictions do not allow the exclusion or limitation of certain damages, so some of the above limitations may not apply to you. In such jurisdictions, our liability is limited to the maximum extent permitted by law.

You agree to defend, indemnify, and hold harmless LifeByLogic, its editorial team, and its affiliates from any claims, damages, obligations, losses, liabilities, costs, or debt — including reasonable attorneys' fees — arising from: (a) your use of and access to the Service; (b) your violation of any term of these Terms; or (c) your violation of any third-party right, including without limitation any copyright, property, or privacy right.

We may terminate or suspend your access to the Service immediately, without prior notice, for any reason — including, without limitation, if you breach these Terms. Upon termination, your right to use the Service will cease immediately.

All provisions of these Terms which by their nature should survive termination — including ownership provisions, warranty disclaimers, indemnity, and limitations of liability — will survive.

These Terms are governed by the laws of the State of Ohio, United States, without regard to its conflict of law principles. Any disputes arising out of or related to these Terms or the Service will be resolved exclusively in the state or federal courts located in Hamilton County, Ohio. You consent to the personal jurisdiction of those courts.

If any provision of these Terms is held invalid or unenforceable, the remaining provisions will remain in full effect.

We reserve the right to modify these Terms at any time. When we do, we will revise the "Last Updated" date at the top of this page. Material changes will be announced prominently on the Site. What constitutes a material change will be determined at our sole discretion.

By continuing to access or use the Service after those revisions become effective, you agree to be bound by the revised Terms. If you do not agree to the new Terms, stop using the Service.

For questions about these Terms — including corrections, clarifications, or notices of claimed copyright infringement — please contact us at hello@lifebylogic.com. We try to respond within one week.

See also our Privacy Policy for information on how we handle data.