Legal

Cookie Policy

Last updated: 1 May 2025

Quick summary: We use essential cookies to remember your theme preference. We use analytics cookies (anonymised) to understand usage. If you consent, we use Google AdSense cookies for advertising. You can opt out of non-essential cookies at any time.

1. What are cookies?

Cookies are small text files stored on your device when you visit a website. They allow websites to remember your preferences and understand how you use the site. Cookies can be "session cookies" (deleted when you close your browser) or "persistent cookies" (stored until they expire or you delete them).

2. Cookies we use

Cookie name	Type	Purpose	Duration
`theme`	Essential	Stores your dark/light theme preference	1 year
`cookie-consent`	Essential	Stores your cookie consent decision	1 year
`_vercel_analytics`	Analytics	Anonymised usage analytics (no personal data, no cross-site tracking)	Session
`__ga`, `__ga_*`	Analytics	Google Analytics (if enabled) — distinguishes unique users	2 years
`IDE`	Advertising	Google DoubleClick — used by Google AdSense to show relevant ads	1 year
`DSID`	Advertising	Google — identifies signed-in Google users for ad personalisation	2 weeks
`test_cookie`	Advertising	Google — checks if your browser supports cookies	Session
`NID`	Advertising	Google — stores preferences for Google ads	6 months

3. Essential cookies

Essential cookies are required for Calculy.io to function properly. They cannot be switched off. They include your theme preference (dark or light mode) and your cookie consent decision. These cookies do not collect personal information and are not used for advertising.

4. Analytics cookies

We use Vercel Analytics to understand how visitors use our site — which calculators are most popular, how long people spend on each page, and where they come from. Vercel Analytics is designed for privacy: it does not use cross-site tracking cookies and does not store personally identifiable information.

Analytics data is used solely to improve the Service. We do not share analytics data with third parties for advertising purposes.

5. Advertising cookies (Google AdSense)

Calculy.io uses Google AdSense to display advertisements. Google AdSense places cookies to:

Track which ads you have seen to avoid showing the same ad repeatedly
Serve ads relevant to your browsing interests (personalised advertising)
Measure the performance of advertisements
Prevent ad fraud

Google's advertising cookies may track your activity across multiple websites. For more information, see Google's Privacy Policy and How Google uses cookies.

You can opt out of personalised advertising by visiting:

Note: opting out of personalised advertising does not mean you will see no ads — it means ads will not be based on your browsing history.

6. How to control cookies

Using our consent banner

When you first visit Calculy.io, a cookie consent banner will appear. You can choose to accept all cookies, accept only essential cookies, or customise your preferences. You can change your preferences at any time by clicking "Cookie Settings" in the footer.

Through your browser

All modern browsers allow you to manage cookies through their settings. Here are links to instructions for common browsers:

Note: blocking essential cookies may affect the functionality of Calculy.io (e.g. your theme preference will not be remembered).

7. Do Not Track

Some browsers include a "Do Not Track" (DNT) feature. Calculy.io respects DNT signals for analytics tracking. However, Google AdSense cookies may not respond to DNT signals — use the opt-out links above to control advertising cookies.

8. Changes to this policy

We may update this Cookie Policy when we add new features, change our analytics tools, or in response to regulatory changes. Material updates will be reflected in the "Last updated" date above.

9. Contact

Questions about cookies? Email us at info@calculy.io or use our contact form.