Privacy Policy

At CalculatorBowl, we firmly believe that your mathematical calculations, personal financial models, mortgage loan balances, and daily computations belong entirely to you. We have engineered our architecture from the ground up to uphold the highest standards of digital privacy, adhering strictly to global frameworks including the EU General Data Protection Regulation (GDPR), the California Consumer Privacy Act (CCPA), and the Children's Online Privacy Protection Act (COPPA).

🛡️ 1. The 100% Client-Side Computation Guarantee

Unlike conventional web portals that process mathematical inputs on remote web servers, CalculatorBowl executes all calculation engines, amortization generators, and unit converters locally inside your web browser.

• Zero Numeric Input Transmission: When you enter a loan amount, interest rate, salary figure, investment balance, or fractional equation, those numbers never leave your device.
• No Backend Calculation Databases: We do not log, capture, store, or transmit your calculation variables or results to any database or remote cloud endpoint.
• Zero Financial Profiling: Because calculations happen on your hardware, CalculatorBowl creates no behavioral financial profiles, credit scoring records, or user tracking dossiers.

💾 2. Local Storage & Client State Usage

CalculatorBowl utilizes standard browser local storage mechanisms (localStorage and sessionStorage) exclusively to enhance your personal user experience:

• Theme Preferences: Storing your display selection between Light Mode and Dark Mode so your preferred aesthetic is preserved across visits.
• Handheld Calculator History Tape: Storing your recent handheld equations locally on your device for rapid reference. This tape can be completely cleared at any time with a single click.
• Client-Side Only: Data stored in local storage remains confined to your browser sandbox and is never transmitted over the network.

📶 3. Service Workers & Offline PWA Capabilities

CalculatorBowl includes an integrated Progressive Web App (PWA) Service Worker (sw.js) that caches static site assets (HTML, CSS styles, JavaScript bundles, and typography) locally. This allows you to load and execute calculations completely offline without sending any network requests.

📊 4. Non-Personal Server Logs & Web Analytics

When accessing web assets from CalculatorBowl, standard HTTP web servers automatically record non-personally identifiable technical connection telemetry:

• Technical data includes your IP address (anonymized), browser user-agent, operating system, requested page URL, and access timestamp.
• This aggregate telemetry is used solely for network security, defending against automated DDoS attacks, optimizing CDN asset caching, and fixing 404 broken links.
• Server logs are never merged with calculation parameters.

🍪 5. Cookies & Advertising Transparency

CalculatorBowl does not use invasive cross-site tracking cookies. In the event that contextual non-personalized advertisements are displayed to support free hosting infrastructure, advertising partners may use basic non-identifiable cookies to prevent duplicate ad impressions. You can easily manage or block cookies through your browser privacy settings.

👶 6. Children's Privacy (COPPA Compliance)

CalculatorBowl is an educational resource suitable for students of all ages. In full compliance with COPPA, we never solicit, collect, or store personal information from children under 13 years of age.

⚖️ 7. Your Data Rights Under GDPR & CCPA

Because CalculatorBowl does not collect or store personal user accounts or calculation records, you enjoy complete data sovereignty by default:

• Right to Erasure: Instantly wipe all locally stored tape history and theme settings by clearing your browser cache.
• Right to Non-Discrimination: Enjoy unrestricted, identical access to all 37+ calculators without requiring personal data disclosure.

📬 8. Privacy Inquiries & Contact

If you have questions regarding our privacy architecture or client-side calculation safeguards, please reach out via our official Contact Portal.