Effective Date: April 6, 2026 | Last Updated: April 6, 2026
Stackd ("Stackd," "we," "us," or "our") is a sole proprietor business (LLC formation pending) operating the Stackd mobile application, accessible at stackd.health. We provide an educational platform for tracking dietary supplements and understanding how they may interact with personal health data.
For privacy-related questions, contact us at: support@stackd.health
This Privacy Policy applies to all personal information collected through:
By using Stackd, you agree to the collection and use of information in accordance with this policy. If you do not agree, please do not use the app.
| Category | Specific Data | Why It's Collected |
|---|---|---|
| Account | Email address, password (hashed), name | Account creation and authentication |
| Health Profile | Date of birth, biological sex, height, weight, health goals | Personalized supplement analysis |
| Supplement Data | Supplement names, dosages, schedules, brands, stacks | Core app functionality — tracking and analysis |
| Lab Results | Uploaded or manually entered lab values (e.g. blood panels) | Enhanced AI analysis and insights |
| Payment | Subscription tier; billing handled entirely by Stripe | Subscription management |
If you sign in with Apple or Google, we receive your email address and name as provided by those services. We do not receive your Apple or Google password.
We use your information exclusively to operate and improve Stackd. Specifically:
We do not sell your personal data. We do not use your data for advertising.
If you are located in the European Economic Area (EEA) or United Kingdom, we process your data under the following legal bases:
Your data is stored in Supabase, a managed database platform hosted on AWS infrastructure. Data is stored in the United States. If you are located outside the US, your data will be transferred to and processed in the US.
While we implement reasonable security measures, no method of transmission over the internet or electronic storage is 100% secure. We cannot guarantee absolute security of your data.
We use the following third-party services to operate Stackd. Each has its own privacy practices:
| Service | Purpose | Data Shared |
|---|---|---|
| Supabase | Database, authentication, file storage | All user data including health profile, supplements, lab results |
| Stripe | Payment processing | Email address, subscription tier. Payment card data is handled entirely by Stripe — we never see or store card numbers. |
| Anthropic (Claude API) | AI-powered supplement analysis | Health profile, supplement data, and any lab results you choose to include in an analysis request |
| Expo | Mobile app platform and delivery | Device metadata, crash reports |
| Apple / Google | Optional social sign-in | Email and name (only if you choose to sign in with Apple or Google) |
We retain your personal data for as long as your account is active. Specifically:
Upon account deletion, we will delete or anonymize your personal data within 30 days, except where retention is required by law.
In addition to the above, you have the right to object to processing, restrict processing, and lodge a complaint with your local data protection authority.
California residents have the right to know what personal information is collected, to request deletion, to opt out of the sale of personal information (we do not sell personal information), and to non-discrimination for exercising these rights.
To exercise any of these rights, contact us at support@stackd.health. We will respond within 30 days.
Stackd is intended for users who are 18 years of age or older. We do not knowingly collect personal information from anyone under 18. If you believe a minor has created an account, please contact us immediately at support@stackd.health and we will delete the account promptly.
Stackd operates from the United States. If you access the app from outside the US, your data will be transferred to and processed in the US. By using Stackd, you consent to this transfer. We rely on standard contractual clauses and other appropriate safeguards where required by applicable law.
We may update this Privacy Policy from time to time. When we make material changes, we will notify you via email or through a prominent notice in the app at least 14 days before the changes take effect. The "Last Updated" date at the top of this page reflects the most recent revision. Continued use of Stackd after changes take effect constitutes your acceptance of the updated policy.
If you have any questions, concerns, or requests regarding this Privacy Policy or how we handle your data: