Effective date: September 12, 2026 · Last updated: September 12, 2026
These Terms of Use ("Terms") are a binding agreement between you ("User", "you") and Rig Floor Tech ("we", "us", the "Developer"), governing your use of the Mud Engineer Pro and Mud Engineer Lite mobile/web applications (the "App"). By downloading, installing, or using the App, you agree to these Terms. If you do not agree, do not use the App.
The App is a quick-reference calculation aid for drilling fluid (mud) engineering. It is not a substitute for:
All results must be independently verified before being relied upon for any operational, safety-critical, well-control, cementing, or pressure-related decision. Formulas used are based on commonly published industry references (e.g., API recommended practices) but simplifications, rounding, unit-conversion assumptions, or input errors can all affect accuracy. You are solely responsible for confirming every figure against your company's approved procedures before acting on it.
Mud Engineer Lite is free to use and is supported by third-party advertising (Google AdMob); see the Privacy Policy for what that involves. Mud Engineer Pro is a paid, one-time purchase with no advertising. Purchases are processed by the app store (Apple App Store / Google Play), not by us directly — refunds and payment disputes are handled under that store's own policies.
Subject to these Terms, we grant you a limited, non-exclusive, non-transferable, revocable license to install and use the App on devices you own or control, for your own personal or professional use. This license does not grant you any ownership of the App or its underlying code, design, formulas presentation, or branding.
The App performs mathematical calculations based on values you enter, using formulas drawn from generally available drilling-fluid engineering references. The App does not verify the correctness, completeness, or applicability of any value you enter, does not know your well conditions, and cannot substitute for site-specific engineering review.
THE APP IS PROVIDED "AS IS" AND "AS AVAILABLE", WITHOUT WARRANTY OF ANY KIND, WHETHER EXPRESS, IMPLIED, OR STATUTORY, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, ACCURACY, RELIABILITY, OR NON-INFRINGEMENT. WE DO NOT WARRANT THAT ANY CALCULATION, RESULT, REFERENCE VALUE, OR CONTENT IN THE APP IS ACCURATE, CURRENT, OR ERROR-FREE, OR THAT THE APP WILL BE UNINTERRUPTED OR FREE OF DEFECTS.
TO THE MAXIMUM EXTENT PERMITTED BY APPLICABLE LAW, THE DEVELOPER AND ITS OFFICERS, EMPLOYEES, AND AGENTS SHALL NOT BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, CONSEQUENTIAL, OR PUNITIVE DAMAGES, INCLUDING BUT NOT LIMITED TO PERSONAL INJURY, DEATH, PROPERTY DAMAGE, LOSS OF WELL CONTROL, LOST PROFITS, LOST DATA, OR ANY OTHER LOSS ARISING FROM OR RELATED TO YOUR USE OF, OR INABILITY TO USE, THE APP, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. THIS LIMITATION APPLIES REGARDLESS OF THE LEGAL THEORY ON WHICH A CLAIM IS BASED (CONTRACT, TORT, NEGLIGENCE, STRICT LIABILITY, OR OTHERWISE).
Some jurisdictions do not allow the exclusion or limitation of certain damages, so some of the above limitations may not apply to you to the extent prohibited by mandatory local law.
You accept full responsibility for how you use the App and for every decision made using its results. To the maximum extent permitted by law, any loss, damage, injury, or error arising from incorrect or incomplete input, misuse, misinterpretation, or reliance on the App's output — whether caused by a software defect, a formula simplification or rounding, a unit-conversion assumption, or your own data entry — is your responsibility and not the Developer's. The App is a decision-support aid only; the responsibility for the final engineering decision always remains with you and your employer.
You agree to indemnify and hold harmless the Developer from any claim, liability, damage, loss, or expense (including reasonable legal fees) arising out of or related to your use or misuse of the App, your violation of these Terms, or your violation of any right of a third party.
The App, including its source code, design, logo, icons, branding, and compiled reference content, is owned by the Developer and protected by copyright and other intellectual property laws. Except for the limited license in Section 1, no rights are transferred to you.
You agree not to: reverse-engineer, decompile, or attempt to extract the App's source code except where permitted by law; remove or alter any copyright, trademark, or proprietary notice; use the App to build a competing product; or use the App in any way that violates applicable law.
The App may reference industry-standard formulas, units, or terminology (for example, from API recommended practices). Such references are provided for engineering context only and do not imply certification, endorsement, or approval by any standards body, and do not represent that the App itself is certified against any such standard.
We may update, modify, or discontinue features of the App at any time, including formulas, reference data, or supported languages, without prior notice. We may also update these Terms from time to time; continued use of the App after an update constitutes your acceptance of the revised Terms.
We may suspend or terminate your license to use the App at any time if you violate these Terms. You may stop using the App and uninstall it at any time.
These Terms are governed by the laws of Germany, without regard to its conflict-of-laws principles, except where mandatory consumer-protection law in your country of residence requires otherwise.
If any provision of these Terms is found unenforceable, the remaining provisions will remain in full force and effect.
These Terms, together with the Privacy Policy, constitute the entire agreement between you and the Developer regarding the App.
Questions about these Terms can be sent to mudengineerpro.tech@outlook.de.