Introduction
Welcome to Halal Math (“we,” “our,” or “us”). We respect your privacy and are committed to protecting your privacy. The short version: the calculators run entirely in your browser, this site collects nothing about you, and the figures you enter never leave your device. The rest of this page sets that out in full.
Information We Collect
Information You Provide
Our calculator operates entirely in your browser. The investment data you enter (initial investment, monthly contributions, return rates, etc.) is processed locally on your device and is not transmitted to or stored on our servers.
What We Collect Automatically
Nothing. This site runs no analytics, no tracking pixels and no third-party scripts of any kind. We do not know how many people visit, which pages they read, or where they came from.
Serving a web page unavoidably reveals your IP address and browser version to whoever delivers it, and our hosting provider keeps those request logs for delivery and security. We do not read them, connect them to anything, or build any profile from them.
How We Use Your Information
We hold no information about you, so there is nothing to use, nothing to share and nothing to sell. We do not run advertising, we do not operate a mailing list, and we have never passed anything to a third party because we have never had anything to pass on.
Cookies
This site sets no cookies. It carries no advertising, no analytics and no third-party tracking scripts.
Your choice of light or dark theme is saved in your browser's local storage under the key investment-calc-theme. That value stays on your device, is never sent anywhere, and clearing your browser data removes it.
Third-Party Services
Our website may contain links to third-party websites and integrates the following services:
- Our hosting provider: serves the pages and keeps standard server request logs, which include IP addresses and user-agent strings, for security and reliability
- Google Fonts: the Geist typefaces are compiled into the site at build time and served from our own domain, so your browser makes no request to Google
That is the whole list. Everything else the page needs, including the icons and the charts, is built into the site and served from this domain, so your browser contacts nobody but us.
Data Security
We implement appropriate technical and organizational measures to protect the information we collect. However, no method of transmission over the Internet or electronic storage is 100% secure. While we strive to use commercially acceptable means to protect your information, we cannot guarantee its absolute security.
Your Rights
Depending on your location, you may have certain rights regarding your personal information, including:
- The right to access your personal information
- The right to request correction of inaccurate data
- The right to request deletion of your data
- The right to opt out of certain data processing
- The right to data portability
Children's Privacy
Our website is not intended for children under 13 years of age. There is nothing here for a child to submit: the calculators take no account, no sign-up and no personal details, and every figure you type stays in your browser. We hold no personal information about anyone, of any age.
Changes to This Policy
We may update this Privacy Policy from time to time. We will notify you of any changes by posting the new Privacy Policy on this page and updating the “Last updated” date. You are advised to review this Privacy Policy periodically for any changes.
Your Data Rights
Rights of access, correction, deletion and portability all rest on someone holding data about you. We hold none. There is no account, no database and no mailing list, and the numbers you enter never leave your device. Clearing your browser data removes the one thing this site does store, which is your choice of light or dark theme.