Cookie Policy
Last updated: March 2026
This Cookie Policy explains how ThePrimeCalculator ("we," "us," or "our") uses cookies and similar technologies on ThePrimeCalculator.com (the "Site"). It describes what these technologies are, why we use them, and your choices regarding their use.
1. What Are Cookies?
Cookies are small text files that are stored on your device (computer, tablet, or mobile) when you visit a website. They are widely used to make websites work efficiently, provide a better user experience, and supply information to site owners.
Cookies can be "session" cookies (deleted when you close your browser) or "persistent" cookies (remaining on your device for a set period or until you delete them). They can be set by the site you are visiting ("first-party cookies") or by other services whose content appears on the page ("third-party cookies").
2. Cookies and Technologies We Use
We use a minimal set of cookies and browser storage technologies. Below is a detailed breakdown:
2.1 Essential Cookies (Strictly Necessary)
These cookies are necessary for the Site to function properly and cannot be disabled.
| Cookie | Purpose | Duration | Type |
|---|---|---|---|
| sb-*-auth-token | Stores your authentication session when signed in. May be split across multiple numbered cookies for large tokens. | Session / 1 year | First-party |
2.2 Analytics Cookies
These cookies help us understand how visitors interact with the Site by collecting and reporting information anonymously.
| Cookie | Purpose | Duration | Type |
|---|---|---|---|
| _ga | Google Analytics: distinguishes unique users by assigning a randomly generated number. | 2 years | Third-party |
| _ga_* | Google Analytics 4: maintains session state across page requests. | 2 years | Third-party |
2.3 Local Storage (Browser Storage)
In addition to cookies, we use your browser's localStorage to store preferences locally on your device. This data is never sent to our servers.
| Key | Purpose | Duration |
|---|---|---|
| theme | Stores your preferred color theme (light or dark mode). | Until cleared |
| bookmarks | Stores your bookmarked calculators for quick access. | Until cleared |
3. Cookies We Do Not Use
We do not use advertising cookies, remarketing cookies, social media tracking pixels, or any other form of behavioral tracking for advertising purposes. We do not serve ads on the Site and do not share your data with advertising networks.
4. Managing Cookies
You can control and manage cookies in several ways:
4.1 Browser Settings
Most web browsers allow you to control cookies through their settings. You can typically set your browser to block all cookies, accept only first-party cookies, or delete cookies when you close your browser. Please note that blocking essential cookies may prevent sign-in functionality from working.
Instructions for managing cookies in popular browsers:
4.2 Google Analytics Opt-Out
You can opt out of Google Analytics tracking by installing the Google Analytics Opt-out Browser Add-on. This add-on instructs the Google Analytics JavaScript not to send information to Google Analytics.
4.3 Clearing Local Storage
To clear localStorage data (theme and bookmark preferences), you can use your browser's developer tools or clear your browsing data. In most browsers, clearing "site data" or "local storage" will remove these items.
5. Impact of Disabling Cookies
If you choose to disable cookies, the following functionality may be affected:
- Sign-in: Disabling essential cookies will prevent you from signing in via Google. All calculators will still work without signing in.
- Analytics: Disabling analytics cookies or using the opt-out add-on will prevent us from collecting usage data, but will not affect your experience on the Site.
- Preferences: Clearing localStorage will reset your theme preference and remove any saved bookmarks.
6. Changes to This Cookie Policy
We may update this Cookie Policy from time to time to reflect changes in technology, legislation, or our data practices. We will notify you of any changes by posting the updated Cookie Policy on this page and updating the "Last updated" date. We encourage you to review this policy periodically.
7. More Information
For more information about how we handle your data, please read our Privacy Policy.
If you have any questions about our use of cookies, please contact us at:
ThePrimeCalculator
Email: info@theprimecalculator.com
Website: theprimecalculator.com