Privacy Policy

Last updated: February 2, 2026

What we collect

  • • Email address (for account creation)
  • • Notes and documents you create
  • • Chat conversations with AI
  • • Handwriting images and PDFs you submit for AI processing
  • • Course progress and activity data
  • • Authentication profile info (via Google or Apple sign-in)
  • • Usage analytics and interaction data
  • • Session recording data (anonymized screen interactions)
  • • Ad interaction data
  • • Subscription and purchase history

How we use it

  • • Provide the service
  • • Process subscriptions
  • • Improve the app

Third parties

AI Processing

Content you submit is sent to these providers:

  • Anthropic (Claude): AI chat, handwriting-to-LaTeX, PDF analysis
  • Google (Gemini): AI content processing
  • OpenAI: AI content processing
  • X.AI (Grok): Handwriting recognition
  • Mathpix: Math handwriting OCR

Analytics

  • PostHog: Usage analytics, event tracking, and session replay

Authentication

  • Google Sign-In: OAuth login
  • Apple Sign-In: OAuth login

Advertising

  • Google AdMob: Ad serving (interstitial and rewarded ads)

Storage & Infrastructure

  • Supabase: Database and authentication
  • Firebase: Cloud file storage

Payments

  • RevenueCat: Subscription management

AI data processing

Handwriting images, PDFs, and text you submit may be sent to cloud-based AI providers for processing. On-device processing is used where possible to minimize data sent externally.

Advertising

Free-tier users may see ads served by Google AdMob, including interstitial and rewarded ads. Google may collect ad-related data such as ad interactions and device identifiers.

Session recording

PostHog session replay captures anonymized screen interactions to help us improve the app. No passwords, payment information, or sensitive input fields are captured.

Your rights

You can access, correct, or delete your data. Email us at markmiller0470@gmail.com

Contact

Questions about privacy? Email markmiller0470@gmail.com