Privacy Policy

Stackable is a personal collection management app operated as an independent project. This Privacy Policy explains what information we collect, how we use it, and your rights regarding your data. By using Stackable, you agree to the practices described in this policy.

Account information: When you sign up, we collect your name, username, and email address. This information is stored securely in Supabase.

Collection data: Items you add to your collection, including titles, ISBNs, authors, notes, ratings, reading statuses, tags, and public or private visibility choices.

Social data: Follow and following relationships you establish, and public profile information you choose to share.

Waitlist emails: If you join our waitlist before signing up, we store your email address to notify you of access.

Analytics: We use PostHog to collect anonymized product usage events (e.g., which features are used). PostHog may set cookies. You can opt out by using a content blocker. No personally identifiable information is intentionally sent to PostHog.

Performance data: We use Vercel Analytics, which collects aggregated, anonymized performance data. No personal identifiers are associated with this data.

Error diagnostics: We use Sentry to capture application errors and performance data needed to debug and improve reliability. We avoid sending unnecessary personal data.

We use the information we collect to:

• Operate and maintain the Stackable service
• Send authentication and account-related emails (password resets, email confirmations)
• Understand how the product is used in order to improve it
• Respond to support requests

We do not send marketing emails, sell your data to third parties, or serve advertisements.

Your data is stored in Supabase, which runs on Amazon Web Services (AWS). Data is encrypted at rest and in transit. Passwords are never stored in plaintext — they are hashed using industry-standard algorithms managed by Supabase Auth.

While we take reasonable steps to protect your data, no system is completely secure. We encourage you to use a strong, unique password for your account.

Stackable uses the following third-party services, each with their own privacy policies:

Your username and any items you have not marked as private are visible to anyone on your public profile at /u/[username]. You can control the visibility of individual items in your collection settings.

If you delete your account, your public profile and all associated data will be removed.

You have the following rights regarding your personal data:

• Access: You can view your data at any time within the app.
• Deletion: You can delete your account from your account settings. If you need help, you can also contact us at hello@trystackable.com.
• Correction: You can update your account information in Settings at any time.
• Data portability: You can export your collection data as a CSV directly from your profile page.

If you are located in the EU or EEA, you may have additional rights under the General Data Protection Regulation (GDPR), including the right to lodge a complaint with your local supervisory authority.

Stackable uses the following types of cookies:

• Supabase session cookies (essential): Required to keep you logged in. Cannot be disabled without breaking authentication.
• PostHog cookies (non-essential/analytics): Used for anonymized product analytics. You can block these with a content or ad blocker.

Stackable is not directed at children under the age of 13. We do not knowingly collect personal information from anyone under 13. If you believe we have inadvertently collected such information, please contact us at hello@trystackable.com and we will delete it promptly.

We may update this Privacy Policy from time to time. Material changes will be noted with a new effective date at the top of this page. Continued use of Stackable after changes are posted constitutes acceptance of the updated policy.

If you have questions or concerns about this Privacy Policy or your data, please contact us at: hello@trystackable.com