Privacy Notice

Last updated August 9, 2026

A quick age note

You must be at least 13 years old to create a Study64 account.

What Study64 handles

To run the app and keep your library connected to you, Study64 handles:

• Your account email and account-creation information.
• The notes, PDF or Word-document text, and images you submit for generation.
• Decks, folders, flashcards, practice questions, and answers you generate or edit.
• Your flashcard progress, review dates, study days, streak information, and usage counts for generation, tutoring, and AI grading.
• Preferences stored on your device, including theme and sound settings.

Why it's used

This information lets Study64 sign you in, generate study material, save your library, show study and progress features, enforce product limits, and support account export and deletion.

What happens to uploaded notes

Study64 currently reads uploaded files in your browser. It sends the relevant text or file data through a Supabase Edge Function to OpenRouter for AI processing.

The current code doesn't upload or keep the original source file in a Supabase Storage bucket. Generated decks, cards, and questions aren't saved until you choose to save them.

OpenRouter receives the study material and instructions needed to generate content, grade answers, or provide tutoring. Don't submit sensitive personal information or material you aren't allowed to use.

Services Study64 relies on

• Supabase provides authentication, database storage, and Edge Functions.
• Resend sends transactional emails, such as signup confirmation and password reset, through Supabase Auth's custom SMTP integration.
• OpenRouter processes AI generation, grading, and tutor requests.
• Stripe may process checkout when Study64's optional Stripe-hosted payment links are configured. You enter payment-card details on Stripe's service; they aren't stored in Study64's frontend database.
• Google AdSense code loads on Study64's landing and app pages. Google may process browser, device, network, cookie, or advertising information according to its own services and settings.
• Google Fonts serves the typefaces used across Study64's pages.
• jsDelivr, a content delivery network, serves the Supabase JavaScript library used by the sign-in and app pages.
• cdnjs (Cloudflare) serves the Mammoth library used to read .docx files in your browser.

When you share a deck

Decks start out private. If you create a share link, signed-in people who have it can copy that deck's content. Revoking the link stops future access through the link, but it can't remove a copy someone already added to their account.

Taking your data with you

Settings provides a JSON export of your Study64 account content, study progress, and usage. The export leaves out passwords, authentication tokens, billing information, service secrets, and other users' data.

Deleting your data

You can request permanent account deletion from Settings. If your account is on a paid plan, subscription cancellation must be resolved first so external billing can't continue. Deletion removes the Supabase Auth account and the data connected to it through Study64's database relationships.

Your controls

You can edit or delete individual decks, revoke share links, export your data, or request account deletion. If you have a privacy or account question, use the Support page.