Field-ready drilling-fluid calculations for mud engineers
If you have a question, found a problem, or want to suggest a new calculator or feature, get in touch. Emails are usually answered within 1–2 business days.
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Does the app work offline?
Yes. Mud Engineer Pro works fully offline — no signal needed on the rig,
and no data leaves your phone.
Can I switch between US and Metric units?
Yes. You can switch between US oilfield and Metric units with one tap.
Is there a subscription?
No. Mud Engineer Pro is a one-time purchase — no subscription and no ads.
Mud Engineer Pro is a quick-reference aid. Always verify results against your company's approved procedures before acting on any operational, safety-critical or well-control decision.