Privacy Policy

Last Updated: July 26, 2026

Overview

CalcProMaster is committed to protecting your privacy. This policy explains what data we collect, how we use it, and your rights.

What Data We Collect

Data We DO Collect:

• localStorage data (browser-side only): Your calculation history, favorites, preferences, and settings are stored in your browser's localStorage. This data never leaves your device.
• Anonymous usage statistics (with consent): If you consent, we use Google Analytics to collect anonymous data about page visits, popular calculators, and general usage patterns. No personal information is collected.
• Currency exchange rates: When using currency calculators, we fetch real-time rates from a third-party API (open.er-api.com). No personal data is sent.

Data We DO NOT Collect:

• No user accounts or registration
• No personally identifiable information (name, email, address)
• No server-side storage of your calculations
• No tracking across websites
• No selling of data to third parties

How We Use Data

• localStorage: To provide features like history, favorites, and saved presets. This data is stored only in your browser.
• Analytics (optional): To understand which calculators are most popular and improve the service. You can opt out via the cookie banner.
• AdSense (optional): If you consent, Google AdSense may show ads. You can opt out via the cookie banner.

Third-Party Services

CalcProMaster uses the following third-party services:

• Google Analytics: Anonymous usage statistics (only if you consent). Google Privacy Policy
• Google AdSense: Advertising (only if you consent). Google Ads Policy
• open.er-api.com: Currency exchange rates. Exchange Rate API Terms

These services may use cookies. You control consent via the cookie banner on first visit.

Your Rights

You have the right to:

• Clear your data: Delete your browser's localStorage at any time via browser settings or CalcProMaster's "Clear History" button.
• Opt out of analytics: Reject non-essential cookies via the cookie banner.
• Opt out of ads: Reject non-essential cookies or use an ad blocker.

What Stays on Your Device

Calculation history, favourites, theme choice and your cookie decision are stored in localStorage under this site's own key space. They survive a refresh, a browser restart and an offline session, and they disappear when you clear site data. Nothing in that store is transmitted: there is no account, no sync and no server-side copy to request or delete. On a shared computer, use the "Clear History" control before you leave, or open a private window so the store is discarded when you close it.

Children's Privacy

CalcProMaster is a general-audience reference site and does not knowingly collect personal information from children. Because there are no accounts, no profiles and no uploaded inputs, a child using the site creates no server-side record. Analytics and advertising scripts only load after a visitor accepts the cookie banner; declining leaves the calculators fully usable.

Data Security

Since all calculations run in your browser and no data is sent to our servers, your data is as secure as your device. We recommend:

• Using a secure, up-to-date browser
• Not using CalcProMaster on shared/public computers if you save sensitive calculations
• Clearing your browser data if you share your device

GDPR & International Users

CalcProMaster complies with GDPR principles:

• Consent is freely given via our cookie banner
• Data collection is minimal and purpose-specific
• You can withdraw consent or delete data at any time

Changes to This Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last Updated" date.

Contact Us

Questions about privacy? Contact us at: [email protected]