Privacy & Cookie Policy — Turbomachinery.ai

1. About this Policy

Turbomachinery.ai ("we", "us", or "our") operates the website at turbomachinery.ai and any associated tools, calculators, reference content, and paid or commercial services made available through it (collectively, the "Services"). This Privacy & Cookie Policy explains, in plain English, what personal information we may collect about you, why we collect it, who we share it with, how long we keep it, the cookies and similar technologies we use, and the choices you have.

This policy is written for transparency. It is provided as a clear description of our practices and is not a guarantee of any particular legal outcome. For questions about how this policy applies to you in a specific situation, please contact us at the address in the "Contact" section below.

2. Information we collect

We try to collect only what we need to run the Services. The categories below describe what we may collect; not every category applies to every visitor.

2.1 Account & contact information you provide

If you contact us, request a custom service, or sign up for a paid feature, we may collect details you give us such as your name, email address, company, role, phone number (optional), and the description of what you are asking us to do. Providing this information is optional; if you do not provide it, we may not be able to respond to your request.

2.2 Payment, subscription & access-verification information

If you purchase or subscribe to a paid service, our payment or subscription provider collects the information needed to take payment from you (such as card details, billing address, and transaction identifiers). We do not store full card numbers ourselves. We do receive and retain a record of the transaction (for example: payment status, plan, amount, date, and a provider-issued reference) and the access tokens needed to verify that your paid access is currently valid.

2.3 Service usage & tool inputs/outputs

When you use a tool or calculator on the Services, the values you enter are processed in your browser to produce a result. Where a tool requires server processing, the inputs and outputs may be transmitted to us so the tool can run. We use this information to provide the result you requested, to improve the tool, and to investigate errors. We do not use tool inputs or outputs to build advertising profiles.

2.4 Device, session & security data

When you visit the site, our servers and our security tooling may automatically log technical information such as your IP address, approximate location derived from the IP address, browser and operating-system identifiers, referring page, pages visited, timestamps, and short-lived session identifiers. This information is used to keep the site available, protect against abuse and fraud, and diagnose problems.

2.5 Cookies & similar browser-storage technologies

We use first-party cookies and similar storage (such as localStorage, sessionStorage, and short-lived authentication tokens) to make the site work, to keep your paid session valid, to remember your cookie-consent choice, and to support security. Optional categories (preferences, analytics, marketing) are only loaded if you consent to them. Full details are in Part II — Cookie Policy below.

3. How we use your information

We use the information described above for the following purposes:

Provide the Services. Run the website, deliver tools and calculators, respond to enquiries, and fulfill custom-service requests you submit.
Maintain paid access. Verify that a payment or subscription is active, keep your authenticated session valid, and grant access to paid features without re-asking you on every page load.
Process payments and subscriptions. Take payment, confirm receipt, manage refunds and renewals, and keep transaction records — performed by us together with our payment / subscription processor.
Security & fraud prevention. Detect and block abuse, token theft, replay of expired sessions, brute-force attempts, and similar threats; protect the integrity of forms, accounts, and paid sessions.
Customer support. Answer questions, troubleshoot issues, and follow up on requests you have sent us.
Improve the Services. Diagnose errors, understand which tools are useful, and make the site faster and more reliable.
Legal compliance. Comply with applicable laws, respond to lawful requests, and enforce our terms.

4. How we share your information

We do not sell your personal information, and we do not share it for cross-context behavioral advertising. We share information only in the limited situations below:

Service providers we rely on to run the Services. For example: our website hosting and content-delivery provider, email provider, error-monitoring tooling, and similar infrastructure providers. They may process information on our behalf only to deliver their service to us, and only under appropriate confidentiality and data-protection terms.
Payment and subscription processors. If you purchase or subscribe to a paid service, the payment provider receives the data needed to take payment and maintain your subscription. The processor handles your card data under its own privacy terms, which we encourage you to review.
Legal & safety. We may disclose information when we believe in good faith that we are required to by law or legal process, or where disclosure is necessary to protect the rights, safety, or property of Turbomachinery.ai, our users, or the public.
Business transfers. If Turbomachinery.ai is involved in a merger, acquisition, or sale of assets, information may be transferred as part of that transaction; we will notify users where required.

5. How long we keep your information

We keep personal information only as long as we need it for the purpose it was collected for, to provide ongoing service to you, or to meet legal, accounting, tax, or security obligations. In practice this means:

Contact-form submissions and custom-service requests: kept long enough to respond to you, complete the work, and handle follow-up questions, then archived or deleted.
Paid-access & subscription records: kept while your subscription is active and for a reasonable period afterwards to handle refunds, disputes, and tax / accounting requirements.
Server & security logs: kept for a short period (typically days to a few months) to investigate errors and abuse, then rotated out.
Cookies and tokens: kept according to the periods described in Part II — Cookie Policy.

6. Your choices & rights

You have meaningful choices about your information:

Access & copy. You can ask us what personal information we hold about you and request a copy.
Correct. You can ask us to correct information that is inaccurate or out of date.
Delete. You can ask us to delete personal information we hold about you, subject to limits where we still need it (for example, to keep tax records or to deliver a paid service you have not cancelled).
Object / restrict. Where applicable law gives you the right to object to, or restrict, certain processing, you can ask us to do that.
Withdraw consent. Where we rely on consent (for example, optional cookies), you can withdraw it at any time using Cookie Preferences or by contacting us.
Opt out of sale or sharing. We do not sell or share personal information for cross-context behavioral advertising. If that ever changes, we will offer a clear opt-out.
Complain to a regulator. If you are in a jurisdiction with a data-protection authority (for example the EU/EEA, the UK, or certain US states), you have the right to lodge a complaint with them.

To make a request, email us using the contact address below. We may need to verify your identity (for example, by replying from the email address on file) before we act on a request. We will respond within the timeframe required by applicable law.

EU / UK / EEA visitors: we process your information on the legal bases of contract (to deliver a paid service you have requested), legitimate interests (to keep the site secure and to improve it), legal obligation (for tax and similar records), and consent (for optional cookies and any future marketing).

United States visitors: where applicable state law (e.g. CCPA/CPRA, VCDPA, CPA) gives you the rights above, you may exercise them by contacting us. We do not sell or share personal information for cross-context behavioral advertising.

7. Security

We use reasonable administrative, technical, and physical safeguards designed to protect the information we hold — for example, encrypted transport (HTTPS), short-lived authentication tokens, anti-replay and anti-CSRF protections, access controls on administrative tooling, and minimization of the data we keep. No system is perfectly secure, so we cannot guarantee absolute security; please use a strong, unique password if you are asked to create one, and contact us promptly if you believe an account or paid session has been compromised.

8. Children’s privacy

The Services are intended for working professionals and adult users. They are not directed to, and we do not knowingly collect personal information from, children under 16. If you believe a child has provided personal information to us, please contact us and we will take reasonable steps to delete it.

9. International users & data transfers

Turbomachinery.ai is operated from, and our service providers may be located in, jurisdictions that may differ from yours. When you use the Services or contact us, your information may be transferred to, stored in, and processed in those jurisdictions, which may have different data-protection rules than your home country. Where required by applicable law, we use appropriate safeguards (such as standard contractual clauses or equivalent measures) to protect international transfers.

10. Changes to this Policy

We may update this Privacy & Cookie Policy from time to time. When we do, we will update the "Last updated" date at the top of this page, and for material changes we will provide additional notice (for example, via the cookie banner re-appearing or a banner on the site). Your continued use of the Services after an update means you accept the updated policy, to the extent permitted by applicable law.

11. About cookies on this site

This part explains what cookies and similar browser-storage technologies (such as localStorage, sessionStorage, and short-lived access tokens) we may use, why we use them, how you can accept or deny non-essential cookies, and the categories of cookies that are required for the Services to work — including those required to deliver and protect paid services.

A cookie is a small text file stored in your browser by a website. Similar technologies include localStorage, sessionStorage, IndexedDB, and authentication or access tokens (sometimes called bearer tokens or session tokens) that identify your browser to a service for a limited time. In this policy, when we say "cookies" we mean cookies and these similar technologies.

All cookies and tokens used by Turbomachinery.ai are first-party — they are set by Turbomachinery.ai and not by third-party advertising networks. We do not currently load third-party analytics, advertising, or social-media tracking scripts.

12. Categories of cookies we may use

Below are the categories of cookies and similar technologies that may be used on this site. Categories marked "Always on" are strictly necessary and cannot be disabled without breaking the relevant feature (for example, paid-service access or security). Categories marked "Optional" are only enabled if you give consent, and you can withdraw consent at any time.

12.1 Strictly necessary — site & session Always on

Required for the site to function. This includes the consent record itself (tm_cookie_consent, which stores your response to the cookie banner so we do not have to ask again on every page) and short-lived sessionStorage entries used while you fill in a contact form, calculator input, or service-request form. This category is the legal basis on which the Services are delivered to you and cannot be disabled.

12.2 Paid-service access & payment-verification cookies / tokens Always on for paid services

Where you purchase, subscribe to, or otherwise pay for a service offered by Turbomachinery.ai, we (and our payment / subscription processor on our behalf) may set cookies, tokens, or local-storage entries in your browser to:

verify that a payment or subscription is valid and currently active;
preserve and verify your paid access after payment, so you do not need to re-pay or re-authenticate on every page load;
maintain your authenticated / subscribed session while you use the paid feature;
manage payment, refund, and subscription status (e.g. active, past due, canceled);
prevent unauthorized use, fraud, account sharing abuse, and replay of expired tokens;
support security, session continuity, and recovery after a network interruption.

These cookies and tokens are necessary to deliver the paid services you have requested. They cannot be disabled without losing access to paid features. If you reject them at the browser level (for example by blocking all cookies for this domain) the paid features will not load and any payment you have made may not be recoverable through the in-browser session. Where this applies, we treat these cookies as strictly necessary under the ePrivacy / GDPR "strictly necessary for a service explicitly requested by the user" basis.

Subscription access (Alignment Assistant). Calculations in the Alignment Assistant are part of Turbomachinery.ai Professional — $30/month (about $1/day), billed monthly until canceled. Account and subscription state are stored server-side; the only browser-side identifier required for access is a signed, HttpOnly session cookie set after you sign in. The session cookie carries no payment-card data, billing details, or other sensitive payment information — those are handled exclusively by our payment processor. Browsing the Alignment Assistant and using the Unit Conversion, Technical Documentation, and Flange Parallelism tools does not require a subscription.

Important notice regarding paid services. The session cookie that carries your authenticated session is required to verify subscription access on each request. Deletion, blocking, or clearing of cookies for this site, or use of a different browser, device, or private/incognito mode, will sign you out and require you to sign in again before calculations resume. It will not, by itself, cancel or change your subscription — that is managed through the billing portal.

12.3 Security & fraud prevention Always on

Used to protect the Services, your account or paid session, and the integrity of forms. Examples include CSRF / anti-replay tokens, session-binding identifiers, rate-limit and abuse-detection records, and minimal browser fingerprints used only to detect token theft or replay. These are treated as strictly necessary and cannot be disabled without breaking secure access to the Services.

12.4 Preferences Optional

Used to remember non-essential UI choices such as theme, recently used filters, the last opened tab in a tool, or saved inputs in calculators. The tools still work without these, but you may need to re-enter selections each visit.

12.5 Analytics Optional — none currently active

Anonymous aggregate usage statistics that help us understand which tools are used and where to invest improvements. No analytics or third-party tracking scripts are currently active on this site. If we add them in the future, they will only load after you accept this category in the cookie banner or preferences modal.

12.6 Marketing Optional — none currently active

Used to deliver relevant content or measure campaign performance. No marketing or advertising cookies are currently active on this site. If we add them in the future, they will only load after you accept this category. We do not sell or share your personal information for cross-context behavioral advertising.

13. Your choices — accept or deny

On your first visit, a cookie banner is shown with two primary options: Accept and Deny, plus a link to detailed Preferences.

Accept stores your consent for non-essential cookies (Preferences, Analytics, Marketing) and allows them to load if and when we add them, and grants normal access to all tools and paid services on this site.
Deny records your denial of non-essential cookies. Until you change that decision, no non-essential cookies, scripts, or trackers are loaded, and access to the tools, calculators, and paid services on this site is restricted — you can continue to view the main page, but the Services are not available until you accept.
Preferences lets you turn each optional category on or off individually and save the result.

Your decision is stored in a first-party cookie on your device named tm_cookie_consent (a strictly necessary cookie); it is not transmitted to any third party. You can change your choice at any time by clicking Cookie Preferences in the footer of any page, or by clearing this site’s cookies in your browser.

Denial does not block strictly necessary cookies. Choosing "Deny" rejects optional cookies only. It does not disable cookies and tokens that are required for security, authentication, payment verification, or paid-service access — those are strictly necessary to deliver the Services you have requested. Denying consent will, however, restrict access to those Services on this site, because the Services rely on the commercial / service tracking and access tokens described above. You can continue to view the main page; to use the tools or paid services, change your choice to Accept.

14. Retention & updates

The consent cookie (tm_cookie_consent) and the per-assistant Tool Use Disclaimer record (tm_tool_disclaimer) are written as session cookies: they have no expiry date set and your browser drops them automatically when you close it. The cookie banner therefore reappears each new browser session and the Tool Use Disclaimer is asked again for whichever assistant you select.

The signed authenticated-session cookie used to verify subscription access is retained only for the lifetime of the session token (rotated on sign-in and revocable on sign-out). After sign-out or expiry it is invalidated server-side and the browser cookie is cleared.

Paid-access cookies and tokens are retained only as long as needed to keep your paid session valid, plus a short grace period for refund / dispute handling, after which they expire automatically.

If we add further strictly necessary cookies in the future, they will be listed in this policy and retained only as long as needed for the feature they support.

15. Legal basis & your rights

EU / UK / EEA visitors: strictly necessary storage (including the consent record, paid-access tokens, and security cookies) is used on the basis of being strictly necessary to provide a service you have explicitly requested. All optional categories (Preferences, Analytics, Marketing) are loaded only with your prior, freely given, specific, and informed consent under the ePrivacy Directive and applicable GDPR provisions. You can withdraw consent at any time using the controls described above.

United States visitors: this site complies with applicable state consumer privacy laws (e.g. CCPA/CPRA), including your right to opt out of the sale or sharing of personal information. We do not sell or share personal information for cross-context behavioral advertising. You may submit privacy requests via the contact email below.

Other jurisdictions: we apply the standards above by default. Where additional local rights apply (for example under LGPD, PIPEDA, or similar regimes), please contact us to exercise them.

16. Browser-level controls

Most browsers let you view, manage, and delete cookies, and block cookies for a specific site. Be aware that blocking strictly necessary cookies will prevent paid services from working and may log you out of any active paid session. Browser-side "Do Not Track" and "Global Privacy Control" signals are honored by treating them as a request to reject non-essential cookies.

17. Contact

Questions about this Policy, your data, your privacy choices, or your cookie choices? Reach out using our and describe your request. We aim to acknowledge privacy requests promptly and respond within the timeframe required by applicable law.