Privacy Policy

1. Information We Collect

We collect two basic types of information from visitors to our website:

Information You Voluntarily Provide

You do not need to create an account or provide personal information to use our calculators. However, if you contact us by email or through a feedback form, you may voluntarily provide us with your name, email address, and any message content you choose to share.

Information Collected Automatically

When you visit our website, certain information is collected automatically by our servers and by third-party analytics services we use. This may include:

• Your device type and operating system
• Your browser type and version
• Your approximate geographic location (derived from IP address, at country or city level)
• Pages you visited on our site and the time spent on each page
• The website that referred you to us (if any)
• The date and time of your visit
• Basic usage statistics such as which calculators you interact with

Important: Our calculators run entirely in your browser. Numbers you enter into a calculator are never sent to our servers. Calculations happen on your own device using JavaScript.

2. How We Use Information

We use the information we collect for the following purposes:

• To operate and maintain our website. Ensuring calculators load correctly and work across devices.
• To understand how visitors use our tools. Aggregate analytics help us decide which calculators to update or build next.
• To support and respond to inquiries. If you email us with a question or feedback, we use your contact information to reply.
• To improve user experience. Understanding which devices and browsers our visitors use helps us design better interfaces.
• To display relevant advertising. We may use third-party advertising services (such as Google AdSense) to display ads that may be more relevant to you based on your browsing activity on our site and other sites.
• To detect and prevent abuse. We monitor traffic patterns to identify and block malicious bots or abusive requests.

We do not sell personal information. We do not build advertising profiles from calculator inputs. We do not use your data for purposes other than those listed above.

3. Cookies & Similar Technologies

We use cookies — small text files placed on your device — and similar technologies to support the operation of our website and analytics.

Types of Cookies We Use

• Essential / Technical Cookies. These are required for basic site functionality such as remembering your preference (e.g., a chosen currency or theme). Without these cookies, the website may not function properly.
• Analytics Cookies. We use services like Google Analytics to understand aggregate traffic patterns. These cookies collect anonymous information about how visitors use our site. You can opt out at any time using Google's browser extension.
• Advertising Cookies. Third-party advertising partners (such as Google AdSense) may use cookies to serve ads on our site and across the web. These cookies help advertisers understand which pages and topics visitors have viewed, enabling more relevant advertising.

Managing Cookies

You can control cookies through your browser settings. Most browsers allow you to block cookies, delete existing cookies, or be notified when a cookie is being set. Please note that disabling cookies may affect the functionality of our calculators.

For Google Analytics specifically, you can use the Google Analytics Opt-out Browser Add-on.

You can also learn more about how Google uses data when you use partner sites and apps at google.com/policies/privacy/partners.

4. Third-Party Services

We rely on the following third-party service providers. Each has its own privacy policy that governs how it processes your data:

• Cloudflare (CDN & Hosting). Our website is hosted and served through Cloudflare's content delivery network. Cloudflare may collect IP addresses and basic traffic information for security and performance purposes. Cloudflare Privacy Policy
• Google Analytics (Analytics). We use Google Analytics to understand traffic patterns. Google Analytics collects anonymized usage data. Google Privacy Policy
• Google AdSense (Advertising). We may display Google AdSense ads on our pages. AdSense uses cookies to serve relevant ads based on your browsing activity across partner sites. Google Ads Technologies

We carefully review third-party services before integrating them. We only work with providers whose privacy practices align with our commitment to respecting your privacy.

5. Data Retention

We retain automatically collected information only for as long as necessary to achieve the purposes described in this policy. In practice:

• Analytics data (Google Analytics) is retained according to Google's default settings — typically 14 or 26 months for aggregated data.
• Server logs (used for security) are typically retained for 30 to 90 days.
• If you contact us by email, we may retain that correspondence for up to 12 months for reference and support purposes.

6. Your Rights & Choices

Depending on your jurisdiction, you may have certain rights regarding your personal information. These may include:

• Access. You can request a copy of the personal information we hold about you.
• Correction. You can ask us to correct inaccurate or incomplete information.
• Deletion. You can request that we delete your personal information, subject to legal obligations that may require us to retain certain records.
• Objection / Restriction. You can object to certain types of processing (such as personalized advertising) or request that processing be restricted.
• Portability. You can request that we provide your personal information in a structured, machine-readable format.
• Withdrawal of consent. Where we rely on consent for processing, you can withdraw that consent at any time.

To exercise any of these rights, or to ask questions about our privacy practices, please contact us using the information at the bottom of this page. We respond to valid requests within 30 days.

Do Not Track Signals

Some browsers include a "Do Not Track" (DNT) signal. We respect DNT preferences. When we detect a DNT signal, we disable analytics cookies and advertising cookies on your browser session. However, essential technical cookies required for calculator functionality remain active.

7. Children's Privacy

Our website is designed for general audiences and is not directed at children under the age of 13 (or the applicable age of digital consent in your jurisdiction). We do not knowingly collect personal information from children. If you believe we have inadvertently collected information from a child, please contact us and we will promptly delete it.

8. International Visitors

Our website is hosted in data centers operated by Cloudflare, which may process data outside your country of residence. By using our website, you understand and consent to the transfer, processing, and storage of information in countries that may have different data protection laws than your country of residence.

For visitors in the European Economic Area (EEA), United Kingdom, and Switzerland: we rely on appropriate safeguards such as Standard Contractual Clauses and the inherent privacy-protecting design of our services (calculator inputs never leave your device).

9. Changes to This Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or for other operational, legal, or regulatory reasons. When we make material changes, we will revise the "Last Updated" date at the top of this page. We encourage you to review this policy periodically.

10. Contact Us

If you have questions about this Privacy Policy, our data practices, or wish to exercise any of your rights, you can contact us by email at the address below. We take all privacy inquiries seriously and respond within 30 days.

Email: privacy [at] calcpro.cc.cd

Website: https://calcpro.cc.cd