Terms of Service for Fasting Center

Last updated: Nov 12, 2026

Overview

These terms apply to the Fasting Center app for iOS and Android, the fasting.center website, and the Fasting Center connector for Claude and ChatGPT (together, “Fasting Center”). Fasting Center is operated by Andrey Titov. By using Fasting Center, you agree to these terms. If you don’t agree, please don’t use it.

Summary

  • Fasting Center is free to use.

  • It gives estimates and general information, not medical advice.

  • You must be 18 or older to use the calculators and the AI assistant.

  • Use it at your own risk, and talk with a doctor before any long or restrictive fast.

Who Can Use Fasting Center

You must be at least 18 years old to use the fasting calculators, the AI assistant and the connector. Fasting is not recommended for people under 18, people who are pregnant or breastfeeding, or people with a history of eating disorders, diabetes, or other medical conditions unless a doctor supervises them.

Not Medical Advice

Everything in Fasting Center - calculations, projections, fasting stages, articles and AI assistant answers - is general information and an estimate. It is not medical advice, diagnosis or treatment, and it does not replace a doctor. Results vary from person to person. Never stop or change a medication because of something you read in Fasting Center. If you feel dizzy, faint or confused, or notice chest pain or a racing heartbeat, stop your fast and contact a doctor. Medical supervision is advised for fasts longer than 10 days.

Safety Limits

Fasting Center applies safety limits to its calculations. It gives no projections for people under 18 or for a body mass index at or under 18.5, and no plan below 800 kcal a day. It does not support dry fasting, and it adds a medical-supervision note to fasts over 10 days. These limits are not a guarantee that a fast is safe for you.

Your Account and Data

You can use most of Fasting Center without an account. If you create one, you are responsible for keeping your sign-in secure. You can delete your account and data at any time in the app’s Settings. How we handle your data is described in our Privacy Policy at https://fasting.center/fasting-center-app-privacy.

The Connector for Claude and ChatGPT

The Fasting Center connector lets Claude and ChatGPT run Fasting Center’s calculators. It needs no sign-in and stores no personal data. Claude and ChatGPT are operated by Anthropic and OpenAI, and your use of them is governed by their own terms. We are not responsible for how those services present or change the connector’s results.

Acceptable Use

Please don’t misuse Fasting Center. This includes trying to break, overload or reverse engineer the service, sending automated requests at high volume, using it to harm others, or using it in breach of any law.

Intellectual Property

The Fasting Center name, logo, app, website content and calculators belong to Fasting Center. You may use them for your own personal use. Please don’t copy, resell or republish them without permission.

Changes and Availability

We may change, pause or stop any part of Fasting Center at any time. We may also update these terms. When we do, we change the date at the top of this page. If you keep using Fasting Center after a change, you accept the updated terms.

Disclaimer and Limitation of Liability

Fasting Center is provided “as is” and “as available”, without warranties of any kind. To the fullest extent the law allows, Fasting Center and Andrey Titov are not liable for any injury, health problem, loss or damage that results from using Fasting Center or relying on its estimates.

Governing Law

These terms are governed by the laws of the State of California, United States.

Contact

Questions about these terms? Email us at support@fasting.center.