Overview
At Calcus ("we", "us", or "our"), your privacy is a priority. This Privacy Policy explains how we handle information when you use calcus.online. The short version: all calculations run entirely in your browser and your inputs are never sent to our servers.
Information We Collect
We collect minimal information necessary to operate and improve the site:
- Usage Data: We use Google Analytics to collect anonymized data about how visitors use our site — pages visited, time spent, device type, and general location (country/region level). This does not include any personally identifiable information.
- Calculator Inputs: We do not collect, store, or transmit any values you enter into our calculators or tools. All calculations happen locally in your browser.
- Contact Form: If you contact us via our contact form, we collect your email address and message to respond to your inquiry.
- Cookies: We use cookies for Google Analytics (analytics cookies) and Google AdSense (advertising cookies). You can opt out of these at any time.
How We Use Information
- To understand how visitors use Calcus and improve our tools
- To respond to your messages when you contact us
- To display relevant advertising through Google AdSense
- To monitor site performance and fix technical issues
Google Analytics
We use Google Analytics 4 (GA4) to collect anonymized usage statistics. Google Analytics uses cookies to track visits. The data collected includes page views, session duration, bounce rate, and device/browser information. IP addresses are anonymized. You can opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on.
Google AdSense
We use Google AdSense to display advertisements on Calcus. Google AdSense may use cookies and web beacons to serve ads based on your interests and browsing history. You can manage your Google ad settings at adssettings.google.com.
Cookies
Calcus uses the following types of cookies:
- Analytics cookies (Google Analytics): Help us understand site usage. Non-essential, can be declined.
- Advertising cookies (Google AdSense): Used to serve relevant ads. Non-essential, can be declined.
You can control cookies through your browser settings. Disabling cookies will not affect the functionality of any Calcus tool.
Third-Party Services
Calcus uses the following third-party services:
- Google Analytics — Usage analytics (Google Privacy Policy)
- Google AdSense — Advertising (Google Privacy Policy)
- Google Fonts — Typography (fonts loaded from Google's CDN)
Children's Privacy
Calcus is not directed at children under 13. We do not knowingly collect personal information from children. If you believe a child under 13 has provided us personal information, please contact us and we will delete it.
Your Rights
Depending on your location, you may have the following rights:
- The right to access information we hold about you
- The right to request deletion of your data
- The right to opt out of analytics and advertising cookies
To exercise any of these rights, contact us at the address below.
Changes to This Policy
We may update this Privacy Policy from time to time. When we do, we'll update the "Last Updated" date at the top of this page. Continued use of Calcus after changes constitutes acceptance of the updated policy.
Contact Us
If you have questions about this Privacy Policy or how we handle your data, please contact us here.