Privacy Policy

1 Information We Collect

What You Give Us Directly

You don't need an account to use any of our calculators or read our tutorials. The only time you'd share personal info is if you contact us directly, in which case you might give us your name and email so we can write back.

What Gets Collected Automatically

Like most websites, ours picks up some data in the background when you visit. Here's what that looks like:

• Your device: things like browser type, operating system, screen size, and whether you're on a phone, tablet, or computer
• How you use the site: which pages you visit, how long you stay, what brought you here, and which calculators you interact with
• Your IP address, which can give a rough idea of your general location (city-level, not your street)

This happens through cookies and similar tools. More on that in the Cookies & Tracking section.

What We Don't Collect

There's a lot we never touch: no passwords, no payment info, no Social Security numbers, no precise GPS location. And the numbers you type into our fraction calculators? Those never leave your browser. All the math runs locally on your device.

2 How We Use Your Information

Here's what we actually do with the data described above:

• Keep the site running. If a calculator breaks on Safari but works fine on Chrome, usage data helps us spot that and fix it.
• Figure out what's useful. Analytics tell us which pages people actually use, so we can build more of what helps and less of what doesn't.
• Show ads to pay for keeping everything free (details in Third-Party Services).
• Reply to you if you send us a message through the contact form.
• Meet any legal requirements that apply to us.

3 Cookies & Tracking

What Are Cookies?

Cookies are small text files that websites save on your device. They help a site remember things (like your preferences) and understand how people use it.

The Cookies We Use

• Essential cookies handle basic stuff like remembering whether you've already accepted our cookie notice. You can't turn these off without breaking the site.
• Analytics cookies let us see anonymous, aggregated data through Google Analytics. Things like how many people visited the adding fractions page last Tuesday. No names attached.
• Advertising cookies come from our ad partners and help them show relevant ads and measure performance. These can track browsing across multiple sites.

How to Control Them

Your browser lets you block or delete cookies. Just know that turning off certain ones might break some features. If you want to opt out of personalized ads specifically, you can use the DAA WebChoices opt-out or the YourAdChoices control page.

4 Third-Party Services

Ads

Running a free website costs money. Ads help cover that. Our ad partners use cookies to learn about your browsing habits so they can show ads you're more likely to care about. Right now our main partner is:

• Google AdSense / Google Ad Manager. You can read Google's privacy policy at policies.google.com/privacy.

All our ad partners must follow COPPA. For content aimed at kids, personalized ads are turned off entirely (more on that in Children's Privacy).

Analytics

Google Analytics helps us see which pages get traffic and where visitors come from. It's all anonymous, aggregated data. If you'd rather not be included, install the Google Analytics Opt-out Browser Add-on.

Google Fonts

The fonts on this site load from Google's servers. That means your browser connects to Google when a page loads to grab the font files. Google's privacy policy covers that data transfer.

Affiliate Links

Some pages include affiliate links to educational products. If you click one and buy something, we earn a small commission at no extra cost to you. These links are always marked with rel="nofollow sponsored", and we disclose them on every page where they appear. Full details are on our Affiliate Disclosure page.

5 Children's Privacy (COPPA)

Here's how we stay COPPA-compliant:

• No data collection from kids. We don't knowingly collect personal info from anyone under 13. The site is designed so you never have to hand over a name, email, or anything else to use it.
• No accounts. There's no sign-up, no login, no profile. Kids can use every calculator and read every tutorial without identifying themselves.
• Ads are content-based only. On pages likely visited by children, we only show contextual ads (based on the page topic, not the user). Behavioral targeting is off.
• Math stays in the browser. When your child types "3/4 + 1/2" into a calculator, that calculation happens entirely on their device. Nothing gets sent to us.
• No comments, chat, or forums. There's nowhere on this site for kids (or anyone) to post personal info publicly.

If you're a parent or guardian and think your child somehow gave us personal information, let us know right away. We'll delete it.

6 Data Security

The site runs over HTTPS, so all data moving between your browser and our servers is encrypted. We review our hosting setup regularly, limit who can access any data we process, and use trusted hosting providers with strong security track records.

No website can promise 100% security. But we follow industry-standard practices and take this stuff seriously.

7 Your Rights & Choices

Depending on where you live, you may have certain rights over your data:

• Access. Ask us what data we have about you.
• Deletion. Ask us to delete it.
• Opt out of tracking through your browser settings or the tools listed in Cookies & Tracking.
• Global Privacy Control (GPC). If your browser sends a GPC signal, we treat it as a legally valid opt-out request and limit data collection accordingly. GPC has replaced the older "Do Not Track" header, which most browsers have discontinued.

To use any of these rights, reach out to us. We'll respond within 30 days.

California Residents

Under the CCPA (as amended by the CPRA), California residents have additional rights: the right to know what's collected, the right to request deletion, the right to correct inaccurate personal info, the right to limit how sensitive personal info is used, and the right to opt out of data sales or sharing. Since we don't sell or share personal info in the first place, those last ones are already covered.

European Economic Area (EEA) Residents

Under the GDPR, you have rights to access, correct, erase, restrict, port, and object to your data processing. Our legal basis is legitimate interest for running the site and analytics, plus consent for non-essential cookies.

8 Changes to This Policy

This policy might change as our site grows or as laws evolve. When it does, we'll update the "Last Updated" date at the top. For anything major, we'll put a notice on the site so you don't miss it.

9 Contact Us

Got a question about this policy or how we handle data? Here's how to reach us:

We aim to get back to you within 30 days. If we can't resolve your concern, you may also have the right to file a complaint with your local data protection authority.