Privacy Policy

stax  ·  Last updated August 2026

This Privacy Policy explains how stax ("we", "our", or "the app") collects, uses, and protects information when you use the stax mobile application and related services.

Information we collect

• Account information. Your email address, display name, and an internal account identifier, collected when you sign in, so you can access the same library across devices.
• Saved content. Cards, decks, Been ratings, source links, captions, screenshots, and extracted details you choose to save inside stax.
• Technical and operational data. Basic request metadata (device type, request timestamps, error logs) used to authenticate you, protect the service, diagnose errors, and limit abuse. No advertising identifiers are collected.

How we use your information

• To provide and operate the stax service, including saving, organizing, and displaying your personal library.
• To authenticate your identity and protect your account.
• To identify and extract useful details from content you choose to save, using AI processing services (see "Third-party providers" below).
• To diagnose and fix errors and to protect against abuse.

We do not sell your data or use it for advertising.

Third-party providers

• Clerk (authentication). Clerk handles sign-in, one-time verification codes, session tokens, and the authentication identity linked to your stax profile. Clerk processes your email address under its own Privacy Policy.
• OpenAI and Google Gemini (AI processing). Source text, images, or video you submit for saving may be processed by OpenAI or Google Gemini to identify and organize what you asked stax to save. These providers handle submitted content under their respective privacy policies: OpenAI and Google.
• Google Places (location). Place names or nearby context may be sent to the Google Places API to match a venue and return canonical location details. Google handles this data under its Privacy Policy.

Data retention

Your profile and saved library remain available while your account exists. Operational logs and short-lived provider-side copies follow each provider's own retention rules. When you delete your account, stax permanently removes your app profile and saved library and requests removal of the connected authentication identity from Clerk. Deletion is immediate and cannot be undone.

Your rights and choices

• Delete your account. Open stax → Settings → Delete account. All personal data held by stax is erased.
• Access or portability requests. Email us at asuri2@chicagobooth.edu.

Children

stax is not directed to children under 13. We do not knowingly collect personal information from children.

Changes to this policy

We may update this policy from time to time. The "Last updated" date at the top will reflect any changes. Continued use of stax after an update constitutes acceptance of the revised policy.

Contact

Questions about this policy or your data? Email asuri2@chicagobooth.edu.