Terms of Service

Last updated: March 31, 2026

1. Acceptance of Terms

By creating an account or using My Fasting Journal ("the Service"), you agree to these Terms of Service. If you do not agree, please do not use the Service.

2. Description of Service

My Fasting Journal is a free health tracking application that provides:

• Intermittent fasting timer with scientific milestones
• Estimated fat oxidation calculator based on the Mifflin-St Jeor equation
• Health data visualization (weight, sleep, activity, nutrition)
• Optional integration with Garmin Connect
• Personalized health insights based on your data

3. Medical Disclaimer

The Service is for informational and tracking purposes only. It does not provide medical advice, diagnosis, or treatment.

• All metabolic calculations (BMR, fat oxidation, calorie estimates) are approximations based on population-level studies and may not reflect your individual physiology.
• The fat burn calculator uses the Mifflin-St Jeor equation and substrate oxidation ratios from published metabolic chamber studies. These are estimates, not measurements.
• Health insights are based on correlations in your personal data and general health guidelines. They are not personalized medical recommendations.
• Milestone descriptions (autophagy, ketosis, etc.) are based on published research but individual responses vary significantly.

You should:

• Consult a healthcare professional before starting any fasting regimen
• Not fast if you are pregnant, nursing, under 18, or have eating disorders
• Seek medical supervision for extended fasts (over 24 hours)
• Stop fasting immediately if you feel unwell
• Not rely solely on this app for health decisions

4. User Accounts

• You must be at least 18 years old to create an account
• You are responsible for maintaining the security of your account
• You must provide accurate information during registration
• One account per person

5. Acceptable Use

You agree not to:

• Use the Service for any illegal purpose
• Attempt to access other users' data
• Use automated systems (bots) to create accounts or interact with the Service
• Reverse-engineer the Service
• Use the Service to provide medical advice to others

6. Garmin Connect Integration

If you choose to connect your Garmin account:

• You authorize us to access your Garmin health data
• We sync data automatically at regular intervals
• You can disconnect at any time from Settings
• Garmin's Terms of Service and Privacy Policy also apply

7. Pricing

My Fasting Journal is 100% free. There are no premium tiers, no ads, and no hidden fees. The Service is supported by voluntary donations.

8. Data and Privacy

Your use of the Service is also governed by our Privacy Policy. We never sell your data and never show ads.

9. Limitation of Liability

To the maximum extent permitted by law:

• The Service is provided "as is" without warranties of any kind
• We are not liable for any health outcomes resulting from use of the Service
• We are not liable for inaccuracies in metabolic calculations or health insights
• We are not liable for data loss, though we make reasonable efforts to maintain data integrity

10. Scientific Sources

Our metabolic calculations and health information are based on the following peer-reviewed sources:

• Mifflin et al. (1990) — Predictive equation for resting energy expenditure
• Patel et al. (2023) — 60h fasting metabolic chamber study
• Wang et al. (2024) — 21-day fasting physiological changes
• Effects of Fasting on Metabolic Hormones (2024)
• Critical Assessment of Fasting (2025), Endocrine Reviews

11. Termination

You may delete your account at any time from Settings. We may terminate accounts that violate these Terms.

12. Changes to Terms

We may update these Terms. Continued use of the Service after changes constitutes acceptance.

13. Governing Law

These Terms are governed by the laws of the European Union and Romania.

14. Contact

For questions about these Terms: support@myfastingjournal.com