Privacy Policy

Smartly Calculators (“we,” “us,” or “our“) respects your privacy. This Privacy Policy explains what information we collect when you visit smartlycalculators.com, how we use it, and the choices you have. We’ve written this in plain English instead of legalese — if anything is unclear, email us and we’ll explain.

1. Who We Are and How to Reach Us

Smartly Calculators operates the website at smartlycalculators.com as a free online directory of mathematical, financial, health, and everyday-life calculators. For any privacy-related question or to exercise the rights described below, contact us at [email protected].

2. Information We Collect

We have intentionally designed our service to collect as little personal information as possible. We collect three categories of data:

a) Information You Provide Directly

• Contact form submissions: name, email address, the topic of your inquiry, and the message you write.
• Calculator request submissions: name, email, the calculator you’re requesting, category, details, and optional formula reference.
• Embed request submissions: first name, last name, email, and the domain where you intend to embed our calculator.
• Newsletter subscription: email address only.

b) Information Collected Automatically

• Server logs: your IP address, browser type, operating system, referring page, and timestamps. This is standard hosting log data retained for security and abuse prevention.
• Analytics data: pages visited, approximate location (country/region only), device category, time on page, and source of traffic. This is aggregated and cannot be tied to you individually.
• Advertising data: where a third-party advertising network such as Google AdSense serves an advertisement, that vendor may receive your IP address, browser and device type, and the page you are viewing, and may set or read its own cookies. We do not receive that data ourselves.
• Cookies and similar technologies: details in our Cookie Policy.

c) Information We Do Not Collect

• Calculator inputs (loan amounts, BMI values, Zakat amounts, etc.) are processed entirely in your browser. We never see them.
• We do not require account creation. There is no login, password, or user profile.
• We do not collect payment information because all our calculators are free.

3. How We Use Your Information

We use the information we collect strictly for these limited purposes:

• To respond to your contact, embed, or calculator-request submission.
• To send the newsletter, if you’ve subscribed (you can unsubscribe at any time using the link in every email).
• To monitor traffic patterns, identify popular calculators, and improve the site.
• To detect, prevent, and respond to fraud, abuse, security incidents, or technical issues.
• To comply with legal obligations.

4. Legal Bases for Processing (GDPR)

If you are in the European Economic Area, the United Kingdom, or another jurisdiction with similar protections, we rely on the following legal bases under the General Data Protection Regulation:

Consent

For non-essential cookies and newsletter subscription. You may withdraw consent at any time.

Legitimate interest

For fraud prevention, basic site analytics, and responding to your inquiries.

Legal obligation

When we must retain or disclose data to comply with applicable law.

5. Cookies and Tracking Technologies

We use a small number of cookies for essential functionality (dark-mode preference, last-used calculator inputs stored locally) and optional anonymous analytics. See the Cookie Policy for the complete list of every cookie this site can set.

Advertising and third-party advertising cookies

Calculator pages may carry advertising. Some placements are sold directly by us and served from this site as a static image or plain HTML: those set no cookies and read no device identifiers. Calculator pages may also carry advertising served by Google AdSense, a third-party advertising network. Where Google AdSense serves an advertisement:

• Third-party vendors, including Google, use cookies to serve ads based on your prior visits to this website or to other websites.
• Google’s use of advertising cookies enables it and its partners to serve ads to you based on your visit to this site and/or other sites on the internet.
• You can opt out of personalised advertising in Google Ads Settings, or opt out of a third-party vendor’s use of cookies for personalised advertising at optout.aboutads.info. Visitors in Europe can also use Your Online Choices.
• How Google handles data from sites that use its services is set out in Google’s own policy.

No third-party advertising script loads before you have given consent where consent is required, and Global Privacy Control and Do Not Track are treated as a refusal worldwide. Nothing you type into a calculator is sent to us or to any advertiser — calculator inputs are processed entirely in your browser. We place no advertising on the home page, the About page, the contact page or the legal pages.

6. Sharing and Disclosure

We do not sell, rent, or trade your personal information. We share information only in these limited situations:

• Service providers who help us operate the site (hosting, email delivery, analytics, advertising) — bound by contract to use the data only for the services they perform for us. Where advertising is served by Google AdSense, Google acts as an independent third party under its own policy, not as our processor.
• Legal compliance when required by valid subpoena, court order, or to protect our legal rights.
• Business transfer if Smartly Calculators is acquired or merges with another entity, in which case the new owner will be bound by this Privacy Policy.

7. Data Retention

We retain personal information only as long as necessary to fulfill the purposes for which it was collected:

• Form submissions: up to 24 months, then automatically pruned from our system.
• Newsletter subscribers: until you unsubscribe.
• Server access logs: 90 days, then deleted.
• Analytics data: anonymized after 26 months.

8. Your Privacy Rights

Depending on your location, you may have the following rights regarding your personal data:

• Access: request a copy of the personal information we hold about you.
• Correction: ask us to correct inaccurate or incomplete data.
• Deletion: request that we delete your personal information.
• Restriction: ask us to limit how we process your data.
• Portability: receive your data in a machine-readable format.
• Objection: object to processing based on legitimate interests.
• Withdrawal of consent: withdraw any consent you previously gave.

To exercise any of these rights, email [email protected]. We will respond within 30 days. If you live in California, you have additional rights under the California Consumer Privacy Act (CCPA), including the right to know what information we collect and the right to opt out of the sale of personal information — although we do not sell personal information at all. California law also treats cross-context behavioural advertising as “sharing”: where advertising is served, we honour Global Privacy Control as an opt-out of that sharing, worldwide and automatically.

9. Children’s Privacy

Smartly Calculators is not directed at children under the age of 13, and we do not knowingly collect personal information from children. If you believe a child has provided us with personal information, please contact us and we will delete it promptly.

10. International Data Transfers

Our servers are located internationally. If you access Smartly Calculators from outside the country where our servers are located, your data may be transferred across borders. Where required, we use appropriate safeguards such as Standard Contractual Clauses approved by the European Commission.

11. Security

We use industry-standard technical and organizational measures to protect personal information, including HTTPS encryption, secure server infrastructure, regular security audits, and strict access controls. However, no internet transmission is 100% secure, and we cannot guarantee absolute security.

12. Third-Party Links

Our site may contain links to third-party websites (Wikipedia for formulas, Kitco for metal prices, etc.). These sites have their own privacy policies, and we are not responsible for their practices. Please review their policies before providing them with your information.

13. Changes to This Policy

We may update this Privacy Policy from time to time to reflect changes in our practices or legal requirements. The “Last updated” date at the top of this page will always show the most recent revision. Significant changes will be announced via a notice on the homepage or by email if you have subscribed.