Effective Date: [Date – e.g., April 10, 2025]

1. Introduction
   Welcome to Supplement Guru (“App”, “we”, “us”, “our”). This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our mobile application. Please read this policy carefully. By using the App, you agree to the terms of this Privacy Policy. If you do not agree, please do not use the App.
2. Information We Collect
   We may collect information about you in a variety of ways: a. Personal Data You Provide:
   * Account Information: If you create an account (e.g., via email/password or Firebase Auth), we collect authentication credentials like your email address.
   * Profile Information: Information you provide for personalization and AI recommendations, such as your age, weight, weight unit, gender, selected fitness goals, and activity level (“Profile Info”).
   * Supplement Stack & Dosage: Information about the supplements you add to your stack and any dosage/timing information you save (userStack, dosageInfo).
   * Journal Notes: Text entries you make in the app’s journal feature (journalNotesV3). b. Data Collected Automatically:
   * Usage Data: We may collect information automatically about how you use the App, such as features accessed, frequency of use, supplement logging activity (supplementLog), and interaction patterns. This may involve device information (e.g., device type, OS version) for analytics and improvement purposes. We will specify if we use third-party analytics services.
   * AI Interaction Data: Prompts generated based on your Profile Info, Stack, Logs, and Notes are sent to our AI service provider (OpenAI via a secure cloud function, likely Firebase Cloud Functions) to generate responses (recommendations, feedback, insights). We receive and may store these AI-generated responses.
3. How We Use Your Information
   We use the information we collect for various purposes, including:
   • To provide, operate, and maintain the App’s functionality (tracking, journaling, stack management).
   • To personalize your experience.
   • To generate AI-driven supplement recommendations, stack feedback, and insights based on your Profile Info, Stack, Logs, and Notes.
   • To process your requests and respond to your inquiries.
   • To monitor and analyze usage and trends to improve the App.
   • To manage your account (if applicable).
   • To fulfill legal requirements.
4. Data Sharing and Disclosure
   We do not sell your personal information. We may share information under the following circumstances:
   • With Service Providers: We use third-party services to operate the App, such as:
     • Firebase (Google): For backend services like authentication (if used) and cloud functions that securely interact with the AI model. Firebase’s use of data is governed by Google’s Privacy Policy.
     • OpenAI: Prompts containing your anonymized or pseudonymized Profile Info, Stack details, Logs, or Notes (as needed for the specific feature) are sent via our secure cloud function to OpenAI to generate responses. We strive to minimize sending directly identifiable information like email in these prompts, but profile details (age, goals etc.) are necessary for personalization. OpenAI’s use of data is governed by their policies.
     • Analytics Providers (If used): [Specify if you use Google Analytics, Mixpanel, etc., and link their policies].
   • Legal Obligations: If required by law, subpoena, or other legal process, or if we believe in good faith that disclosure is necessary to protect our rights, protect your safety or the safety of others, investigate fraud, or respond to a government request.
   • Business Transfers: In connection with a merger, sale of assets, financing, or acquisition of all or a portion of our business.
5. Data Storage and Security
   • Local Storage: Data such as your profile, stack, logs, notes, and cached recommendations are primarily stored locally on your device using AsyncStorage.
   • Cloud Storage (If Applicable): If using Firebase services like Firestore or Authentication, relevant data is stored according to Firebase security practices.
   • Security Measures: We implement reasonable administrative, technical, and physical security measures to help protect your information from loss, theft, misuse, and unauthorized access, disclosure, alteration, and destruction. However, no electronic transmission or storage system is 100% secure.
6. Your Data Rights and Choices
   • Access and Correction: You can typically review and update your Profile Info directly within the App’s Profile screen. You can view your stack, logs, and notes within their respective screens.
   • Deletion: You can remove supplements from your stack or delete notes. To request deletion of your entire profile data associated with your account (if applicable), please contact us using the information below. Note that deleting your profile via the “Reset Profile” option in the app will clear local data and trigger deletion processes if cloud data is associated.
   • Data Retention: We retain your information for as long as necessary to provide the App’s services to you, or as required by law.
7. Children’s Privacy
   The App is not intended for use by individuals under the age of 18 (or a higher age if required by your jurisdiction). We do not knowingly collect personal information from children under 18. If we become aware that we have collected such information, we will take steps to delete it.
8. International Data Transfers
   Your information may be transferred to — and maintained on — computers located outside of your state, province, country, or other governmental jurisdiction where the data protection laws may differ. Your consent to this Privacy Policy followed by your submission of such information represents your agreement to that transfer (e.g., use of cloud services like Firebase/OpenAI).
9. Changes to This Privacy Policy
   We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new policy within the App or on our website [If you have one: Link to your policy page]. You are advised to review this Privacy Policy periodically for any changes.
10. Contact Us
    If you have any questions about this Privacy Policy, please contact us at:
    [Your Email Address or Contact Method, e.g., privacy@supplementguru.online]

Legal Disclaimer: This Privacy Policy template requires review and modification by a qualified legal professional to ensure compliance with all applicable laws and regulations in your operating jurisdictions, including specific requirements in Vietnam.