Privacy Policy

1. Introduction

Hey, thanks for stopping by CalcDen — a free calculator hub at calcden.online built for anyone who needs a quick, reliable answer, whether that's crunching a mortgage payment, solving a physics equation, or figuring out a tip at a restaurant.

We know privacy policies can feel like a chore to read. We've done our best to write this one in plain English so you actually understand what's going on. This page covers what data we collect, why we collect it, and what control you have over it. If you use CalcDen, you're agreeing to what's described here — but if anything feels unclear, just reach out and we're happy to explain.

2. Information We Collect

CalcDen keeps things simple. Here's what we do and don't collect:

• What you type into calculators — we don't collect this. Every calculation you run happens entirely inside your own browser. Your numbers never leave your device and are never sent to our servers. What you calculate is your business.
• What you share with us directly. CalcDen doesn't require you to create an account. The only time we'd have your name or email is if you reach out to us directly — and we only use that to get back to you.
• Basic visit data collected automatically. Like most websites, our servers and analytics tools log general information when you visit — things like your IP address, browser type, the pages you looked at, and how long you spent on them. This helps us understand how CalcDen is being used and where we can improve.
• Cookies and tracking technologies. We and our advertising partners (including Google) use cookies to make the site work and to show ads. We break this down fully in Sections 3 and 4 below.

3. Cookies & Tracking Technologies

Cookies are tiny text files stored in your browser when you visit a website. They're not harmful — they help sites remember things and function properly. Here's how we use them:

• Essential cookies — These keep the site running smoothly. Without them, certain features might not work.
• Analytics cookies — Tools like Google Analytics use these to give us a high-level picture of how visitors use CalcDen (e.g., which calculators are most popular). The data is anonymized and aggregated — we see trends, not individuals.
• Advertising cookies — Google AdSense and its partners place these to show you ads that are relevant to your interests, based on your browsing activity on CalcDen and other sites.

You're always in control of your cookies. You can adjust or clear them through your browser settings at any time. Just keep in mind that turning off certain cookies may affect how parts of the site work.

If you'd rather not see personalized ads, you can opt out here:

• Google Ads Settings
• Network Advertising Initiative (NAI) Opt-Out
• Digital Advertising Alliance (DAA) Opt-Out

4. Google AdSense & Advertising

CalcDen is completely free to use, and we intend to keep it that way. To cover the costs of running the site, we display ads through Google AdSense, a service by Google LLC. Here's what that means in practice:

• Personalized ads — Google uses cookies to learn about your interests from your browsing behavior and serves ads it thinks you'll find relevant.
• DoubleClick cookies — These help Google track whether an ad was shown, clicked, or led to a result, so advertisers can measure how their ads are performing.
• Remarketing — You might see a CalcDen-related ad while you're browsing another website. That's Google's Display Network at work — it's standard practice for sites that use AdSense.

We don't have access to or control over the specific data Google collects through its advertising systems. That data is governed by Google's own privacy policy, which we encourage you to read:

• Google Privacy Policy
• How Google uses data from partner sites
• Manage or opt out of Google personalized ads

EU visitors can also use YourOnlineChoices.com, and US visitors can visit AboutAds.info to manage ad preferences across many networks at once.

5. How We Use Your Information

We use the data we collect to do a handful of things, all of them aimed at keeping CalcDen useful and running well:

• To keep the site running and make the calculators better over time.
• To understand how people use the site so we know what to improve or add next.
• To show ads through Google AdSense — this is what keeps the site free.
• To reply to you if you've reached out with a question or feedback.
• To spot and fix technical problems before they affect your experience.
• To stay compliant with applicable privacy laws and regulations.

That's it. We don't sell your data. We don't use it for anything underhanded. CalcDen is a tool, and we want it to work well for you.

6. Third-Party Services We Use

To run CalcDen efficiently, we rely on a few trusted external services. Each of them may collect some data as part of how they work:

• Google AdSense — Displays ads on the site. See Section 4 for full details.
• Google Analytics — Helps us understand site traffic and user behavior in anonymized, aggregated form. You can opt out anytime using the Google Analytics Opt-out Browser Add-on.
• jsDelivr CDN — We load Bootstrap (a styling framework) from jsDelivr's servers. They may log basic server request data.
• Google Fonts — We use Google Fonts for typography. Google may log font requests per their standard server practices.

All of these services have their own privacy policies. We encourage you to look them up if you're curious about how they handle data.

7. Who We Share Your Data With

Short answer: we don't sell or trade your information. Period.

There are a few narrow situations where some data might be shared:

• Service providers — Companies that help us run the site (like our hosting provider) may process some data on our behalf, but they're bound by confidentiality agreements.
• Google AdSense — When ads are served on CalcDen, Google and its ad partners receive cookie-based data as part of how the ad system functions (covered in Section 4).
• Legal requirements — If we're ever required by law, court order, or government authority to disclose information, we'd comply — but we'd share only what's strictly required.
• Business changes — If CalcDen is ever acquired or merged with another entity, your information would be part of the transition. We'd do our best to notify you if that ever happened.

8. Your Rights & Choices

You have real options when it comes to your data. Depending on where you're located, these may include:

• Access — Ask us what personal data we have about you (spoiler: it's probably very little).
• Correction — If something we have about you is wrong, we'll fix it.
• Deletion — You can ask us to delete your data. We'll do what we can within legal limits.
• Opt out of personalized ads — See the links in Sections 3 and 4 to manage this directly.
• Data portability — Where applicable, you can request your data in a portable format.
• California residents (CCPA) — You have the right to know what's collected, request deletion, and opt out of any sale of personal information. We don't sell personal information.
• EEA/UK residents (GDPR) — You have full GDPR rights, including the right to complain to your local data protection authority if you feel your rights have been violated.

To make any of these requests, just drop us an email — see Section 12.

9. Children's Privacy

CalcDen is designed for general audiences and is not directed at children under 13 (or under 16 in the EU/UK). We don't knowingly collect personal information from minors. If you're a parent or guardian and you think your child has somehow shared personal data with us, please get in touch and we'll remove it right away.

10. How We Protect Your Data

We take sensible precautions to keep the data we do collect safe — including using secure connections (HTTPS) and working with reputable third-party services. That said, no system on the internet is 100% bulletproof, and we're honest about that. We do our best, but we can't make absolute guarantees about security. If you ever spot something that looks off, please let us know.

11. Updates to This Policy

We'll update this policy from time to time as CalcDen grows or as laws change. When we do, we'll bump the "Last updated" date at the top of this page. If anything significant changes, we'll do our best to make it obvious. We'd recommend checking back occasionally — but we promise not to bury anything important in fine print.

12. Contact Us

Got a question about this policy, want to make a data request, or just want to say hi? We'd love to hear from you.