Privacy Policy

Effective Date: March 12, 2026

MuscleTuna, operated by Minimal Effort ("we", "us", "our"), is a fitness tracking app that helps you plan, track, and analyze your workouts. This policy explains what data we collect, how we use it, and your rights.

1. Data We Collect

Account Information

• Email address and name (via Apple Sign-In or Google Sign-In)
• Profile picture (optional)

Profile & Preferences

• Sex, height, weight (optional, provided during onboarding)
• Fitness goals and training experience
• Preferred units (kg/lbs) and settings

Workout Data

• Exercises performed, sets, reps, weights, and duration
• Rate of perceived exertion (RPE) and workout ratings
• Personal records and training history
• Custom exercises you create

Health & Condition Data

• Self-reported injuries, soreness, and recovery status
• Heart rate and calories (only if you enable Apple Health integration)

AI Feature Data

When you use premium AI features (workout generation, analysis, daily recommendations, trainer guidance), we send relevant workout history, goals, preferences, and active conditions to our AI provider to generate personalized results.

AI Feedback Reports

If you submit feedback on AI-generated content, we collect your sentiment (positive/negative), selected tags, and a snapshot of the AI output to improve our features.

2. Data We Do NOT Collect

• We do not track your location
• We do not collect device identifiers for advertising
• We do not sell your data to third parties
• We do not use your data for advertising

3. Apple Health (HealthKit)

If you grant permission, MuscleTuna can read heart rate and workout data from Apple Health. This data is processed locally on your device and is not uploaded to our servers. You can revoke access at any time in your device's Health settings.

4. Third-Party Services

We use the following services to operate MuscleTuna:

• Supabase — Database and authentication. Your data is stored securely with row-level access controls so only you can access your own data.
• OpenAI — Powers AI features (premium only). Workout history, goals, and conditions are sent for processing. See OpenAI's Privacy Policy.
• RevenueCat — Manages subscriptions. Receives your user ID and subscription status. See RevenueCat's Privacy Policy.
• Sentry — Error and crash reporting. Collects technical error data only. No personal information is sent.
• Apple Sign-In / Google Sign-In — Authentication only. We receive your name and email to create your account.

5. How We Use Your Data

• To provide and personalize workout tracking features
• To generate AI-powered workout recommendations and analysis (premium)
• To track your progress and personal records over time
• To manage your subscription
• To fix bugs and improve app stability

6. Data Retention

We retain your data for as long as your account is active. When you delete your account, all your data is permanently removed, including your profile, workouts, exercises, conditions, AI reports, and stored files. This deletion is irreversible.

7. Your Rights

• Access: You can view all your data within the app.
• Deletion: You can delete your account and all associated data from the app settings.
• Portability: Contact us to request a copy of your data.
• Correction: You can update your profile and preferences at any time in the app.

8. Children's Privacy

MuscleTuna is not intended for children under 13. We do not knowingly collect data from children. If you believe a child has provided us with personal information, please contact us.

9. Health Disclaimer

MuscleTuna is a fitness tracking tool, not a medical device. AI-generated recommendations are for informational purposes only and should not replace professional medical advice. Always consult a healthcare provider before starting a new exercise program or if you have health concerns.

10. Changes to This Policy

We may update this policy from time to time. We will notify you of significant changes through the app. Continued use after changes constitutes acceptance.

11. Contact Us

If you have questions about this privacy policy, contact us at muscletunasupport@minimaleffort.co.