Privacy Policy

Privacy Policy

Last updated: July 2026

1. Information We Collect

MD HD is designed with privacy in mind. We collect minimal information necessary to provide our service:

  • Account Information: Email address for account creation and authentication
  • OAuth Tokens: Encrypted tokens to access connected cloud storage accounts (Dropbox in the 1.0 release)
  • Document Metadata and Cache: File names, paths, sizes, modification dates, and document content cached for up to one hour when needed to render a cloud document
  • Usage Data: Product events such as sign-up, document rendering, storage connection, and subscription state; events may be associated with your account when you are signed in

2. What We Don't Collect

We do not modify or sell your cloud files. Your source files remain in your cloud storage. To provide reading, MD HD may cache document content and metadata; disconnecting an account removes its associated connection and documents from our service.

3. Cloud Storage Access

When you connect a cloud storage provider, we request only the permissions necessary to:

  • List and read markdown (.md) files
  • Access file metadata (name, size, modification date)

We cannot modify, delete, or share your files.

4. Data Security

OAuth tokens are encrypted at rest using Fernet/AES-256. Data in transit is protected with TLS.

5. Third-Party Services

We use the following third-party services:

  • RevenueCat: For iOS in-app purchase management (Premium and Super Premium subscriptions)
  • GlitchTip: For error tracking and crash reporting
  • Cloud Storage Providers: To access your markdown files

6. Your Rights

You can:

  • Disconnect cloud storage accounts at any time
  • Delete your account and all associated data
  • Contact us with privacy questions or data requests

7. Contact Us

For privacy-related questions, contact us at [email protected]