Privacy Policy

This Privacy Policy explains how CalcsVault (calcsvault.com) collects, uses, and protects information when you use our website. We are committed to transparency. CalcsVault does not require account creation or registration to use any calculator. All calculator computations run entirely in your browser, your numeric inputs (loan amounts, weights, dates, etc.) are never sent to our servers.

CalcsVault (calcsvault.com) is operated by Ayan, an individual developer, who is the controller of the personal data described in this policy. You can contact us at support@calcsvault.com. We process personal data on these bases: (1) your consent, for Google Analytics and for Google AdSense advertising cookies and identifiers, which are loaded only after you accept and which you can withdraw at any time using the Cookie settings link in the footer of every page; (2) our legitimate interests in running and securing the website, for example protection against abuse and attacks through our hosting provider; and (3) your request or consent, when you voluntarily submit a review, an article or a contact message. Declining optional cookies does not limit your access to any calculator or page.

Like most websites, our hosting infrastructure and third-party partners may automatically collect technical information including: IP address, browser type and version, operating system, pages visited and time on site, referring URL, and general geographic location (country or city level only). This information is used for security, analytics, and delivering advertisements. It is not used to personally identify you.

Prayer Times and Qibla Finder may request your precise location via the browser Geolocation API. This is always optional, you are never required to share your location. If you grant permission: your coordinates are sent directly from your browser to Aladhan API and OpenStreetMap Nominatim to return your requested result; CalcsVault does not receive, log, or store your location on any server; you can revoke this permission at any time in your browser or device settings.

CalcsVault does not set first-party tracking cookies. We use your browser's localStorage, a private storage area that lives only on your device, to remember two things locally: your colour theme preference (light or dark mode); and Tasbih counter progress. None of this localStorage data is transmitted to CalcsVault's servers or to any third party, it stays on your device and is visible only in your own browser. Clearing your browser's site data or using a different browser/device will reset it. Note: reviews are not stored in localStorage, see Section 10 for how reviews are handled. Third-party services (Google AdSense, Google Analytics) may set their own cookies, but only after you accept optional cookies, see sections 6 and 7.

CalcsVault uses Google AdSense to display advertisements, which is how we keep every calculator free with no paywalls or subscriptions. The AdSense script is loaded only after you accept optional cookies. In the European Economic Area, the United Kingdom and Switzerland, Google also shows its own consent message, where you can accept, refuse or manage your choices for advertising. When you accept, Google and its partners may use cookies and identifiers, including the DoubleClick cookie, to serve and measure ads, including ads based on your interests and prior browsing activity. In US states that have privacy laws, Google's privacy message lets you opt out of the sale or sharing of personal information. To control personalised advertising yourself, visit adssettings.google.com or the NAI opt-out page at optout.networkadvertising.org. For details on how Google uses data from partner sites, visit policies.google.com/technologies/partner-sites. Google acts as an independent controller for the data it collects for advertising. CalcsVault does not control the content of individual advertisements and is not responsible for products or services advertised by third parties on this site.

We use Google Analytics 4 to understand how visitors use CalcsVault, which calculators are most popular, how people navigate the site, and where to improve. Google Analytics is loaded only after you accept optional cookies; until then it is not loaded and nothing is sent to it. Once you accept, it uses cookies and pseudonymous identifiers and reports aggregated statistics such as pages visited, approximate location at country or city level, and device and browser type. Google states that Google Analytics 4 does not log or store individual IP addresses. We use this data only to improve CalcsVault and never sell it. You can withdraw consent at any time with the Cookie settings link in the footer, or install the Google Analytics Opt-out Browser Add-on at tools.google.com/dlpage/gaoptout.

If you send a message through the Contact page, the name, email address and message you type are sent from your browser to Formspree (formspree.io), a form-processing service, which forwards them to us by email. We use this information only to read and reply to your message. Formspree handles the data on our behalf under its own privacy policy. We keep contact messages for as long as needed to deal with your request and any follow-up, and you can ask us to delete them at any time. You can also write to us directly at support@calcsvault.com.

To deliver specific features, your browser sends minimal, anonymous data directly to these third-party services (CalcsVault's own servers are not involved in these requests): Aladhan API (aladhan.com), city name or coordinates, for Prayer Times and Hijri date conversion; OpenStreetMap Nominatim (nominatim.openstreetmap.org), coordinates, for reverse geocoding location names; open.er-api.com, anonymous requests for live currency exchange rates. Like any request on the internet, these requests reveal your IP address to the service. We do not control and are not responsible for how these independent services handle data on their end. Each operates under its own privacy policy.

If you submit a star rating or written review, on a calculator page or on the dedicated Reviews page, the name you type, your star rating, and the text of your review are transmitted to and stored on CalcsVault's servers (Cloudflare KV). Reviews are publicly visible to all visitors of that page; this is different from calculator inputs, which never leave your browser. Please do not include your full legal name, email address, phone number, financial details, or other sensitive personal information in a review, since it is public and visible to anyone. We do not require any login or email to leave a review. Reviews are retained indefinitely unless you request removal. To request deletion of your review, contact us at support@calcsvault.com and we will process your request within 5 business days.

If you submit an article via /articles/write, the title, category, summary, body text, and the name you enter as the author are sent to and stored on our servers (using Cloudflare KV storage) and published publicly on the Articles section for all visitors to see, this is different from other parts of the site, where nothing you type is sent to us. Do not include your full name, contact details, financial account information, or other sensitive personal data in an article or as your author name, since this content is public. Separately, your browser stores a small private record (the article's ID and a one-time edit token) in localStorage so you can find and delete your own articles later from the My Articles page; this record stays on your device and is only sent to our server if you choose to delete that article. If an article is removed for violating our content guidelines, the removal reason is shown to you on My Articles using this same local record. Publishing an article does not require creating an account, and we do not collect your email address or any login information.

We never store your calculator inputs. Reviews and published articles are kept until you ask us to remove them or we remove them under our content guidelines. Contact messages are kept for as long as needed to respond and follow up. Analytics data is kept for the retention period configured in our Google Analytics account, and advertising data is handled by Google under its own policies. CalcsVault is hosted on Cloudflare, and Google and Cloudflare process data in the United States and other countries. Where personal data from the UK, the EEA or Switzerland is transferred outside those regions, we rely on the safeguards offered by these providers, such as the EU-U.S. Data Privacy Framework (with its UK and Swiss extensions) or standard contractual clauses. Messages, reviews and submissions you send us may also be accessed from the country where the site operator is based.

CalcsVault does not store personal calculator data on servers. All pages are served over HTTPS with TLS encryption. Our Cloudflare infrastructure provides DDoS protection and secure headers. While we take reasonable precautions, no internet transmission or storage system is 100% secure, and we cannot guarantee absolute security.

CalcsVault is a general-audience website and is not directed at children under 13 (or under the higher minimum age that applies in your country). We do not knowingly collect personal information from children. If you believe a child under 13 has submitted personal data (for example, through an article submission or a public review), please contact us immediately and we will remove it.

If you are in the United Kingdom, the European Economic Area or Switzerland, you have the right to access the personal data we hold about you, to have it corrected or erased, to restrict or object to its processing, to receive a copy in a portable format, and to withdraw consent at any time (use the Cookie settings link in the footer; withdrawing consent does not affect processing that took place before). We do not store your calculator inputs, so the personal data we can hold is limited to reviews, published articles (including the author name you chose) and contact messages. To use any of these rights, email support@calcsvault.com or use the Contact page. We aim to reply within 5 business days and always within the period required by law (one month under UK and EU law). If you believe we have handled your data unlawfully, you have the right to complain to your data protection authority, such as the Information Commissioner's Office (ico.org.uk) in the UK.

If you live in a US state with a comprehensive privacy law, such as California, Virginia, Colorado, Connecticut or Texas, you may have the right to know what personal information we collect and why, to access, correct and delete it, to opt out of the sale or sharing of personal information and of targeted advertising, and not to be discriminated against for exercising these rights. We do not sell personal information for money. Advertising through Google AdSense can count as sharing or targeted advertising under some state laws. You can opt out through the privacy choices message shown on our site (provided by Google), at adssettings.google.com, or by declining optional cookies in our banner. To make a request, email support@calcsvault.com. We aim to respond within 5 business days and in any case within the time your state's law requires (generally 45 days).

We may update this Privacy Policy at any time as our features evolve, for example, when we add new calculators, APIs, or interactive features like reviews and the live scores tool. The Last Updated date reflects the latest revision. Continued use of CalcsVault after changes are posted constitutes your acceptance of the updated policy.

Questions about this Privacy Policy or our data practices? Contact us at support@calcsvault.com or via calcsvault.com/contact. We aim to respond within 5 business days.