Terms of Use

These Terms of Use form an agreement between you and Kyanite Holdings covering your use of the Kyanite Pro application and this website. By downloading, purchasing or using the app you accept these terms. If you do not accept them, do not use the app.

Your purchase is also subject to Apple's App Store terms, including the Licensed Application End User License Agreement. Where those terms grant you rights that these terms do not, Apple's terms apply.

We grant you a personal, non-exclusive, non-transferable licence to install and use the app on devices you own or control, in line with the App Store terms and the rules of your Apple Account.

The app is free to install. Kyanite Pro, an auto-renewing subscription, unlocks the full calculator library, kill sheets, cement jobs, LCM build sheets and inventory reports. It is offered to new subscribers at $9.99 per month or $50 per year, with a 7-day free trial. Kyanite Ultra, which adds the DrillIQ and MudIQ assistants, is offered at $20 per month or $119.99 per year. Existing subscribers keep the price they subscribed at. Prices in other territories are set by Apple’s equivalent price points and may differ. The same subscriptions can also be bought on the web at app.kyanitepro.com, where they are charged to your card by our payment processor and can be managed or cancelled from the Subscription page; one subscription unlocks both the iPhone app and the web console for the same account.

Payment is charged to your Apple Account at confirmation of purchase. The subscription renews automatically unless it is cancelled at least 24 hours before the end of the current period, and your account is charged for renewal within 24 hours of the end of that period. Any unused portion of a free trial is forfeited when you buy a subscription. You can manage or cancel your subscription in Settings › Apple Account › Subscriptions. Refunds are handled by Apple, not by us.

You may not:

• copy, redistribute, resell, rent or sub-licence the app;
• reverse engineer, decompile or disassemble it, except to the extent that applicable law expressly permits it;
• remove or obscure any notice of ownership within the app; or
• extract the calculation library, reference charts or other content for use in a competing product.

This section is the most important part of these terms.

The app is a professional aid intended for trained oil and gas personnel. It performs arithmetic and presents reference data. It has no knowledge of your well, your equipment, your formation, your regulatory regime or the conditions on your location, and it cannot exercise judgement.

It is not a well control program, a safety system, a certification tool or an engineering authority. The well control calculators and the kill sheet exist to check your arithmetic and to keep your pre-recorded data current. They do not make decisions. All well control decisions must follow the operator's and the drilling contractor's well control program and the direction of the person in charge on location.

Every calculator in the app displays its equation, its units, its assumptions and a verification status of VERIFIED, NEEDS VERIFICATION or EQUIPMENT SPECIFIC. You are responsible for reading that status and for confirming that the equation, the assumptions and the units are appropriate to your situation before you act on a result.

You remain solely responsible for verifying every result against your own company's standards, published equipment data and applicable regulations, and for all decisions taken on the basis of them. Nothing in the app creates an engineering, advisory or professional relationship between you and Kyanite Holdings.

Records you create in the app are stored on your device by default. Deleting the app, losing the device or resetting it will destroy those records permanently, and we cannot recover them because we never hold a copy. You are responsible for keeping your own copies of anything you need to retain.

If you use Crews, records you share are also stored on our servers so the rest of your crew can read them. Sharing is a deliberate act: each shared screen has a Mine / crew switch, and nothing moves to a crew until you choose it. Treat a shared record as a crew record — everyone on that crew can see it, and it may remain part of that crew's operational history after you leave. Do not put personal information into shared records, and do not share records you are not entitled to share under your employer's or the operator's confidentiality rules. See our Privacy Policy for the full detail.

An account is required only for Crews. You sign in with Google or Apple, and you are responsible for keeping access to that account secure and for the activity that takes place under it.

A crew admin can add and remove members and change their roles. Every member of a crew needs their own active Kyanite Pro subscription. We may suspend or remove an account that is used to abuse the service or another user.

The app is provided “as is” and “as available”, without warranty of any kind, whether express or implied, including any implied warranty of merchantability, fitness for a particular purpose, accuracy or non-infringement.

We have tested the calculation engine extensively and it is covered by an automated test suite worked against known values. Even so, we do not warrant that the app is free of errors, that any result is accurate or suitable for your particular application, or that it will operate without interruption.

To the fullest extent permitted by law, Kyanite Holdings shall not be liable for any indirect, incidental, special, consequential, punitive or exemplary damages, nor for any loss of profit, revenue, production, data, wellbore, equipment or business opportunity, arising out of or in connection with your use of, or inability to use, the app — whether based in contract, tort, negligence, strict liability or otherwise, and even if we have been advised of the possibility of such damages.

To the fullest extent permitted by law, our total aggregate liability arising out of or in connection with the app shall not exceed the amount you actually paid for it.

Some jurisdictions do not allow the exclusion of certain warranties or the limitation of liability for certain damages. Where that is the case, the exclusions and limitations above apply to you only to the extent permitted in your jurisdiction, and nothing in these terms limits liability for death or personal injury caused by negligence, or for fraud.

You agree to indemnify and hold harmless Kyanite Holdings against any claim, loss or expense arising from your use of the app in breach of these terms, or from any operational decision you take on the basis of a result the app produced.

The app is sold through the Apple App Store. All payments, receipts and refunds are handled by Apple under Apple's terms — we cannot process a refund ourselves. If you believe you are entitled to one, request it through Apple's “Report a Problem” process. If something in the app is not working as described, please contact us first at admin@kyaniteinc.com; we would far rather fix it for you.

We may release updates that change, add or remove features. We may also stop distributing or supporting the app. We will not remotely disable a copy you have already purchased and installed, and because the calculators and sheets run entirely on the device they will continue to function as long as your device supports them. Crew sharing depends on our servers and, like any online service, is not guaranteed to be available without interruption.

The app, its interface, its calculation library, its reference charts and its report layouts remain the property of Kyanite Holdings and are protected by copyright. The underlying engineering formulae are, of course, industry standards in the public domain and belong to nobody — but their particular selection, arrangement, presentation and implementation here do not.

The records you create in the app are yours. We claim no ownership over your inventory, your job sheets or your notes.

We may revise these terms from time to time. The current version is always published on this page with its effective date. Continuing to use the app after a revision means you accept the revised terms.

Questions about these terms can be sent to admin@kyaniteinc.com.