Privacy Policy

Last updated: November 30, 2025

Data Collection

Diagram Maker is committed to protecting your privacy. We do not collect personal data from our users.

  • We do not collect, store, or transmit any personal information
  • All diagrams are stored locally on your device
  • No user tracking or analytics within the application
  • No account creation or user registration required

Local Storage

All your data remains on your device:

  • Diagram files are saved in the folder you choose on your Mac
  • Application preferences are stored locally using standard macOS storage
  • No data is uploaded to our servers or any cloud service
  • You have complete control over your files and can delete them at any time

AI Features

AI features are completely optional and require your own API key:

  • AI features require you to provide your own API key from Anthropic or OpenAI
  • AI requests are sent directly from your device to the chosen provider (Anthropic/OpenAI)
  • We do not see, store, or have access to the content of your AI requests
  • Your API key is stored securely in your device's keychain
  • You control all data sent to AI providers

Third-Party Services

If you choose to use AI features, the following third-party services may be involved:

  • Anthropic (Claude): Subject to Anthropic's Privacy Policy
  • OpenAI (GPT-4): Subject to OpenAI's Privacy Policy

These services are only used when you explicitly enable AI features and provide your own API key.

App Store Subscriptions

If you purchase a PRO subscription:

  • Subscriptions are processed through Apple's App Store
  • We receive anonymous subscription status (active/inactive) only
  • No personal or payment information is shared with us
  • Subscription management is handled entirely by Apple

Website Analytics

Our website (not the application) uses Google Analytics to understand how visitors use our site:

  • We collect anonymous usage statistics (page views, session duration, etc.)
  • No personally identifiable information is collected
  • You can opt-out using browser extensions or settings

Changes to This Policy

We may update this Privacy Policy from time to time. Any changes will be posted on this page with an updated revision date.

Contact Us

If you have any questions about this Privacy Policy, please contact us at support@diagrammaker.app