Privacy Policy

Last updated: May 24, 2026

NEPSYN ("we", "our", "us") is a fitness tracking application. This Privacy Policy explains how we collect, use, and protect your personal information when you use our app.

1. Information We Collect

We collect the following types of information:

• Account Information: Name, email address, and password when you create an account. If you sign in with Google, we receive your name and email from Google.
• Health & Fitness Data: Workout logs, exercise history, body weight, body measurements (chest, waist, biceps, body fat %), nutrition logs (calories, protein, carbs, fat), supplement and medication tracking, habit data, and progress photos that you voluntarily enter.
• Profile Information: Fitness goals, experience level, gym equipment preferences, 1RM (one-rep max) inputs, and unit preferences (lb/kg).
• App Usage Data: Feature usage patterns, crash logs, and performance data collected to improve the app.

2. How We Use Your Information

• To provide and personalize your fitness tracking experience
• To power AI coaching features (workout suggestions, program generation, exercise alternatives, form analysis)
• To calculate progress metrics (strength score, trends, personal records, adherence, recovery readiness)
• To manage your subscription and account
• To send workout reminders and notifications you have enabled
• To fix bugs and improve app performance

3. AI Features

Our AI coaching features use Anthropic's Claude API to process your requests. When you use AI features — including chat, program generation, exercise suggestions, or photo analysis — relevant context from your profile and workout history is sent to Anthropic for processing. Anthropic processes this data solely to generate a response and does not retain your data afterward. Your data is not used to train AI models.

4. Data Sharing

We do not sell your personal information. We do not display ads. We share data only in these limited circumstances:

• Anthropic (AI processing): Workout context sent for AI coaching responses. Data is not retained by Anthropic after processing.
• RevenueCat (subscription management): Your anonymous user ID and purchase receipts are shared with RevenueCat to manage subscription status. RevenueCat does not receive your personal health or fitness data.
• USDA FoodData Central & Open Food Facts (nutrition): Food search queries are sent to retrieve nutritional information. No personal information is included in these queries.
• Social features: If you use social features, your workout summaries and profile information are visible to friends you have accepted. You control who can see your activity.

5. Data Storage & Security

Your data is stored on secure servers hosted by Railway. All data is encrypted in transit using HTTPS/TLS. Passwords are hashed using bcrypt and are never stored in plain text. We implement industry-standard security measures to protect your information.

6. Data Retention

We retain your data for as long as your account is active. When you delete your account, all associated data is permanently removed from our servers within 30 days.

7. Your Rights

You have the right to:

• Access your personal data
• Correct inaccurate data
• Export your workout and nutrition data
• Delete your account and all associated data
• Opt out of notifications at any time

8. Account Deletion

You can delete your account at any time from within the app (Profile → Account Settings → Delete Account) or by contacting us. When you delete your account, the following data is permanently removed: workout history and logs, nutrition logs and meal data, body weight and measurement history, progress photos, habits and habit history, programs and templates, gym profiles, social connections and feed activity, badges and achievements, and all profile information.

This action cannot be undone. Active subscriptions should be cancelled through the Google Play Store or Apple App Store before deleting your account.

9. Children's Privacy

NEPSYN is not intended for children under 13 years of age. We do not knowingly collect personal information from children under 13. If we learn that we have collected data from a child under 13, we will delete it promptly.

10. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of any material changes through the app or by email. Continued use of the app after changes constitutes acceptance of the updated policy.

11. Contact Us

If you have questions about this Privacy Policy or your data, contact us at:

support@nepsyn.com