Cookie Policy
Last updated: June 2026
This Cookie Policy explains how Quick Calci Tools uses cookies and similar technologies when you visit https://tools.quickcalci.com. We have written it to be clear and honest — because understanding what is stored on your device is an important part of trusting a website.
This policy should be read alongside our Privacy Policy and Terms & Conditions.
1. What are cookies?
Cookies are small text files that a website places on your computer, phone, or tablet when you visit. They help websites remember information about your visit — such as your preferences or whether you have been to the site before.
We also use similar technologies such as browser localStorage, which stores data locally on your device in a way that is not sent to our servers. We describe both cookies and localStorage in this policy because they serve similar purposes from your perspective.
2. How we use cookies and storage
We use cookies and browser storage for four broad purposes:
- Essential operation — keeping the Site secure and functional.
- Preferences — remembering choices such as your theme (light or dark).
- Analytics — understanding how the Site is used in aggregate so we can improve it.
- Advertising — supporting free access to the Site through third-party ad programmes such as Google AdSense.
Importantly, cookies and storage on Quick Calci Tools are not used to collect the text, files, or values you enter into our tools. That processing happens in your browser and is not transmitted to us.
3. Cookie categories
Essential cookies
These are necessary for the Site to function securely. They cannot be switched off in our systems. They are usually set only in response to actions you take, such as setting a privacy preference or filling in a form.
Preference cookies and local storage
These remember choices you make so the Site feels familiar on return visits. They are stored on your device and are not sent to our servers.
Analytics cookies
These help us understand how visitors interact with the Site — which pages are popular, how users navigate, and whether anything is broken. The data is aggregated and does not identify you personally in our systems.
Advertising cookies
These may be set by us or our advertising partners (such as Google AdSense) to build a profile of your interests and show you relevant ads on this Site and others. If you do not allow these cookies, you will still see ads, but they may be less relevant to you.
4. Cookies and storage we use
The table below lists the main cookies and local storage items we are aware of on Quick Calci Tools. Third-party providers may update their cookie names from time to time; we review this list periodically and update it when needed.
| Name | Type | Provider | Purpose | Duration |
|---|---|---|---|---|
theme | localStorage | Quick Calci (first-party) | Remembers your light or dark theme preference. | Until cleared |
qc-recent-tools | localStorage | Quick Calci (first-party) | Stores a short list of recently visited tools. | Until cleared |
qc-favorite-tools | localStorage | Quick Calci (first-party) | Stores tools you have marked as favourites. | Until cleared |
qc-notepad-content | localStorage | Quick Calci (first-party) | Autosaves your Notepad draft on your device. | Until cleared |
qc-whiteboard-scene | localStorage | Quick Calci (first-party) | Autosaves your Whiteboard drawing on your device. | Until cleared |
qc-world-clock | localStorage | Quick Calci (first-party) | Remembers your chosen time zones in World Clock. | Until cleared |
qc-markdown-editor-* | localStorage | Quick Calci (first-party) | Stores Markdown Editor documents and view settings locally. | Until cleared |
qc-tool-state-* | localStorage | Quick Calci (first-party) | Remembers last-used inputs or settings for specific tools. | Until cleared |
_ga | Cookie | Google Analytics | Distinguishes unique visitors for traffic measurement. | 2 years |
_ga_* | Cookie | Google Analytics | Maintains session state for Google Analytics 4. | 2 years |
_gid | Cookie | Google Analytics | Distinguishes users for daily traffic reporting. | 24 hours |
cf_clearance | Cookie | Cloudflare | Security and bot-management challenge clearance, when applicable. | Session – 1 year |
__cf_bm | Cookie | Cloudflare | Distinguishes humans from bots to protect the Site. | 30 minutes |
__gads | Cookie | Google AdSense | Measures and limits ad impressions; supports ad delivery. | 13 months |
__gpi | Cookie | Google AdSense | Collects information for ad personalisation and measurement. | 13 months |
IDE | Cookie | Google (DoubleClick) | Used by Google ad products to register and report user actions on ads. | 13 months |
NID | Cookie | Stores preferences and supports ad personalisation across Google services. | 6 months |
AdSense cookies are set when advertisements are displayed on the Site. If no ads are currently shown, some advertising cookies may not be present on your device.
5. Third-party services
The following third parties may set cookies when you use Quick Calci Tools:
- Google Analytics — traffic measurement (ID: G-HLDLZJV4V4). Google Privacy Policy
- Cloudflare — hosting, security, and privacy-oriented web analytics. Cloudflare Privacy Policy
- Google AdSense — advertising programme that may display ads on the Site. AdSense Terms of Service
6. Managing your cookie preferences
You have several options to control cookies and local storage:
- Browser settings — most browsers let you block or delete cookies. Look for "Privacy", "Cookies", or "Site data" in your browser settings. Blocking all cookies may affect how the Site works.
- Clear site data — you can clear cookies and localStorage for tools.quickcalci.com specifically without affecting other sites.
- Google Analytics opt-out — install the browser add-on to prevent Google Analytics from collecting data on any site you visit.
- Ad personalisation opt-out — visit Google Ads Settings or aboutads.info to manage interest-based advertising.
- Do Not Track — some browsers send a "Do Not Track" signal. There is no universal standard for how sites respond, but we respect your browser privacy settings where technically feasible.
7. Changes to this policy
We may update this Cookie Policy when we add new tools, change analytics providers, or update our advertising arrangements. We will revise the "Last updated" date at the top of this page when changes are made. We encourage you to check back periodically.
8. Contact us
If you have questions about our use of cookies or would like help managing your preferences, please visit our Contact page or email hello@quickcalci.com. We are happy to help.