Privacy Policy

for DuctCalc: HVAC Ductulator

Last updated: 2026-10-10

This policy covers DuctCalc. The short version: DuctCalc does not ask you to create an account, and your data stays on your device.

What we collect

Nothing you type is sent to us. Calculations, projects, notes, saved jobs and settings are stored locally on your device and, if you have iCloud backup turned on, in your own iCloud backup. We have no servers holding your content and no way to read it.

Permissions DuctCalc asks for

None. The app requests no device permissions at all.

Advertising

This app does not show ads and contains no advertising SDK.

Purchases

Purchases and subscriptions are handled entirely by Apple or Google. We never see your card, your address or your name — only an anonymous receipt telling the app that a purchase is valid. To manage or cancel a subscription, use Settings on your device; cancelling there is the only thing that stops a renewal.

Analytics and crash reports

We use no third-party analytics SDK. We do see the aggregate, anonymous crash and usage reports that Apple and Google provide to every developer, and only if you have opted into sharing them at the operating-system level.

Children

Our apps are not directed at children under 13, and we do not knowingly collect personal information from them. If you believe a child has provided us with personal information, write to us and we will delete it.

Your rights

Because we hold no personal data about you, there is nothing for us to export or erase on request — deleting the app removes everything it stored. If you are in the EEA or UK (GDPR) or in California (CCPA/CPRA) and want to exercise a right regarding advertising identifiers, contact us and we will help you raise it with the relevant ad network.

Data controller

G. Hdez — P.IVA (VAT no.) 02783550029, Masserano (BI), Italy. Email: [email protected].

This website and cookies

This website sets no cookies and uses no local storage, analytics, tracking pixels, embedded third-party content or contact forms, so there is nothing to consent to and no cookie banner. Fonts and images are served from this same domain. The site is hosted on Cloudflare Pages, which processes your IP address and request data in transient server logs to deliver the pages and protect them from abuse, under its privacy policy.

Legal basis and retention

If you email us we use your message only to answer it (legitimate interest, GDPR art. 6(1)(f), or steps you ask for under art. 6(1)(b)) and delete it once the matter is closed, unless the law requires us to keep it. Personalised ads in our apps rely on your consent (art. 6(1)(a)), which you can withdraw at any time from the app's privacy settings or your device settings. Google and Cloudflare may process data outside the EU under the EU Standard Contractual Clauses or the EU–US Data Privacy Framework.

Your GDPR rights

You can ask for access, rectification, erasure, restriction, portability or object to processing by writing to the email above. You also have the right to lodge a complaint with a supervisory authority — in Italy, the Garante per la protezione dei dati personali.

Changes

If this policy changes we update the date at the top of this page. Material changes will also be noted in the app's release notes.

Contact

the contact button on the support page — we read every message.