Privacy Policy

Last Updated: November 3, 2025

Our Privacy Commitment

SciCalc Pro is built with a privacy-first, local-first approach. We do not track you, collect your data, or require you to create an account.

Data Storage

What We Store (Locally in Your Browser Only)

All your data stays on your device using browser storage technologies:

  • Calculation History: Stored in IndexedDB in your browser
    • What: Your calculations, inputs, results, timestamps, and optional notes
    • Where: Your browser's IndexedDB (never leaves your device)
    • Retention: Until you manually delete it
    • Control: You can clear all history anytime from the History page
  • User Preferences: Stored in localStorage
    • Display mode preferences (decimal vs scientific notation)
    • Default units and angle mode (degrees/radians)
    • Theme preferences
    • Control: Cleared when you clear browser storage

What We Do NOT Store

  • No server databases: We do not have a server database storing user data
  • No accounts: No registration, no login, no passwords
  • No tracking cookies: No analytics, no tracking pixels, no third-party trackers
  • No personal information: We never collect names, emails, IP addresses, or any PII

Data Sharing

We do not share, sell, or transmit any of your data because we don't collect it in the first place.

URL Sharing Feature

When you use the "Share" button on calculators:

  • The calculation state is encoded in the URL (e.g., ?formula=H2O)
  • This allows you to share your exact calculation with others
  • Important: Anyone with the URL can see the calculation state you shared
  • This is entirely optional - you don't need to use sharing features

Third-Party Services

AI Features (if used)

If you use any AI-powered features (optional):

  • Requests are sent to Vercel AI Gateway using OpenAI models
  • Only the specific inputs you provide to AI features are sent
  • No other browsing data or calculation history is included
  • AI providers process requests according to their own privacy policies
  • You can choose not to use AI features at any time

No Other Third Parties

We do not use:

  • Google Analytics or similar tracking services
  • Advertising networks
  • Social media pixels
  • Marketing automation tools
  • Data brokers

Data Security

Since all data stays in your browser:

  • Your responsibility: Keep your device secure
  • Browser security: Modern browsers encrypt IndexedDB data at rest
  • No transmission: Calculations run entirely client-side (no server communication)

Your Rights

You have complete control:

  • Access: View all your saved calculations in the History page
  • Delete: Clear individual calculations or all history anytime
  • Export: Download your calculation history as text or CSV
  • Opt-out: Simply don't use the save/history features

Children's Privacy

SciCalc Pro does not collect any data from anyone, including children under 13. The service is safe for educational use.

Changes to This Policy

We will update the timestamp at the top if we make changes. Since we don't collect contact information, we cannot notify you directly. Please check this page periodically.

Technical Details

For transparency, here's how data flows:

  1. You enter data → Stored in your browser's memory
  2. You perform calculation → JavaScript runs locally in your browser
  3. You see results → Displayed from local computation
  4. You save to history (optional) → Saved to your browser's IndexedDB
  5. You close browser → Data persists in IndexedDB until you delete it

At no point does data leave your device (except if you explicitly use share URLs or AI features).

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