Last updated: June 26, 2026
By downloading or using youFAST ("the App"), you agree to these Terms of Use. If you do not agree, do not use the App.
youFAST is a personal fasting tracker for informational and educational purposes only. It is not a medical device and does not provide medical, nutritional, dietary, or fitness advice. The information provided in the App, including fasting protocols, progress tracking, and educational content, is not intended to diagnose, treat, cure, or prevent any disease or health condition.
youFAST is intended for personal, non-commercial use. You agree not to misuse the App, attempt to reverse-engineer it, or use it in any way that violates applicable laws or regulations.
youFAST Pro is available as a monthly or annual auto-renewable subscription. Payment is charged to your Apple ID account at confirmation of purchase. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. You can manage or cancel your subscription in your App Store account settings.
Free users may access core fasting tracking features. Certain features — including themes, full history, nutrition tracking, Apple Watch support, and the Ember AI Coach — require a Pro subscription.
The Ember AI Coach provides general fasting guidance only. Responses are generated by artificial intelligence and are not a substitute for professional medical, nutritional, dietary, or fitness advice. Always consult a qualified healthcare professional before making changes to your diet, fasting schedule, or exercise routine. Free users are limited to 3 questions per day. Jinx Brothers is not responsible for any decisions made based on Ember's responses.
All content, branding, and assets in youFAST are owned by Jinx Brothers and may not be reproduced without permission.
The App is provided "as is" without warranties of any kind. We do not guarantee uninterrupted or error-free operation.
To the fullest extent permitted by law, Jinx Brothers shall not be liable for any indirect, incidental, or consequential damages arising from your use of the App.
We may update these Terms at any time. Continued use of the App after changes constitutes acceptance of the new Terms.
Questions? Email us at tincupgamer@gmail.com.