Legal

Privacy Policy

Last updated: 1 May 2025

Short version: Calculy.io does not sell your personal data. Most calculations happen entirely in your browser — no data is sent to our servers. We use cookies for analytics and advertising. You can opt out at any time.

1. Who we are

Calculy.io ("Calculy", "we", "us", or "our") is a free online calculator platform. Our registered contact email is info@calculy.io. This Privacy Policy applies to all services available at calculy.io and its subdomains.

We are committed to protecting your privacy in accordance with the Australian Privacy Act 1988 (Cth) and the Australian Privacy Principles (APPs), as well as the EU General Data Protection Regulation (GDPR) for users in the European Economic Area.

2. Information we collect

2.1 Information you provide directly

We only collect personal information you voluntarily provide:

  • Email address — if you use the "Save results" feature to email yourself a calculation summary, or submit the contact form.
  • Name and message — if you contact us via the contact form at /contact.
  • Calculator inputs — only if you choose to save or share results. Input values entered into calculators are processed locally in your browser and are not transmitted to our servers during normal use.

2.2 Information collected automatically

When you visit Calculy.io, we may automatically collect:

  • Usage data — pages visited, time spent, buttons clicked, and navigation patterns (via Vercel Analytics, anonymised)
  • Technical data — browser type, device type, operating system, screen resolution, and approximate geographic location (country/city level, derived from IP address)
  • IP address — used for security, fraud prevention, and geographic analytics. Not stored long-term.
  • Referrer URL — the page you came from before visiting Calculy.io

2.3 Cookies and tracking technologies

We use cookies and similar technologies. See our Cookie Policy for full details. In summary:

  • Essential cookies — required for the site to function (theme preference, consent status)
  • Analytics cookies — Vercel Analytics (privacy-friendly, no cross-site tracking)
  • Advertising cookies — Google AdSense (if you have not opted out) to show relevant ads

3. How we use your information

We use the information we collect to:

  • Deliver the calculator services you request
  • Send calculation results to your email address (only when you explicitly request it)
  • Respond to your contact form submissions
  • Analyse usage patterns to improve our calculators and user experience
  • Display relevant advertisements via Google AdSense (if you have consented)
  • Detect and prevent fraud, abuse, and security threats
  • Comply with our legal obligations

Legal bases for processing (GDPR)

For users in the EEA, our legal bases for processing personal data are:

  • Consent — for advertising cookies and email marketing
  • Legitimate interests — for analytics and site security
  • Contract performance — for delivering saved results to your email
  • Legal obligation — where required by applicable law

4. Google AdSense and advertising

Calculy.io uses Google AdSense to display advertisements. Google AdSense uses cookies to serve ads based on your prior visits to this website and other websites. You can opt out of personalised advertising by visiting Google's Ad Settings or www.aboutads.info.

Google's use of advertising cookies enables it and its partners to serve ads based on your visit to Calculy.io and/or other websites on the internet. Google's privacy policy is available at policies.google.com/privacy.

We do not control the cookies placed by Google AdSense. By using Calculy.io, you consent to Google's data practices as described in their privacy policy, unless you opt out.

5. Data sharing and disclosure

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

  • Service providers — Vercel (hosting and analytics), Resend (email delivery), Google (advertising). Each is bound by data processing agreements.
  • Legal requirements — if required by law, court order, or government request
  • Business transfers — if Calculy is acquired, merged, or sold, data may be transferred. We will notify you by email and/or prominent notice on our site.
  • With your consent — any other sharing will only occur with your explicit consent

6. Data retention

We retain personal data for the minimum period necessary:

  • Contact form submissions — 12 months from receipt
  • Saved calculation emails — email addresses are not stored beyond the immediate send
  • Analytics data — aggregated, anonymised data retained indefinitely; individual session data 90 days
  • Server logs — 30 days

7. Your rights

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

  • Access — request a copy of personal data we hold about you
  • Correction — request correction of inaccurate data
  • Deletion — request deletion of your personal data ("right to be forgotten")
  • Portability — request your data in a machine-readable format (GDPR)
  • Objection — object to processing based on legitimate interests
  • Withdraw consent — withdraw consent at any time for consent-based processing
  • Complaint — lodge a complaint with your local data protection authority

To exercise any of these rights, email us at info@calculy.io. We will respond within 30 days.

Australian users may also lodge a complaint with the Office of the Australian Information Commissioner (OAIC) at oaic.gov.au.

8. Data security

We implement appropriate technical and organisational measures to protect your data against unauthorised access, alteration, disclosure, or destruction. These include HTTPS encryption for all data in transit, access controls on our systems, and regular security reviews.

However, no method of transmission over the internet is 100% secure. We cannot guarantee absolute security and encourage you to use strong, unique passwords and be cautious about what personal information you share online.

9. Children's privacy

Calculy.io is not directed at children under 13 years of age. We do not knowingly collect personal information from children under 13. If you believe we have inadvertently collected such data, please contact us at info@calculy.io and we will delete it promptly.

10. International data transfers

Our services are hosted on Vercel's global infrastructure, with servers primarily in the United States. By using Calculy.io, you consent to the transfer of your data to the United States and other countries where our service providers operate. We ensure appropriate safeguards are in place (including Standard Contractual Clauses for EEA transfers).

11. Third-party links

Our site may contain links to third-party websites. We are not responsible for the privacy practices of those sites. We encourage you to read the privacy policies of any external site you visit.

12. Changes to this policy

We may update this Privacy Policy from time to time. Material changes will be notified by updating the "Last updated" date at the top of this page and, where appropriate, by email notification. Continued use of Calculy.io after changes constitutes acceptance of the updated policy.

13. Contact us

If you have any questions about this Privacy Policy or our data practices, please contact us: