Comparison

Mud Engineer vs Max Drilling

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Mud Engineer

This app provides essential drilling calculations for mud engineers. It helps determine final mud weight, volume adjustments, and the number of sacks needed for various drilling scenarios.

Highlights
  • Final Mud Weight calculation
  • Volume calculations
  • Sack calculations
  • lb/bbl calculation
  • Weight Up calculation
Features
Currently charting
Read full description

Mud Engineer App – Drilling Fluids Calculator Mud engineers play a crucial role in keeping drilling programs running smoothly. The Mud Engineer App is an essential field tool that gives you 14 drilling-fluid and well-control calculators in one place, built for rig work: fast input, clear step-by-step equations, professional PDF reports, and full offline use. CALCULATORS • Final Mud Weight – mix two fluids and get the resulting weight and volume • Volume – volumes of two fluids needed to build a required volume at a target weight • Reduce Mud Weight – barrels of a lighter fluid (water, seawater, diesel) to dilute the mud • Weight Up – sacks, lb/bbl, total material, volume increase and final volume (barite, CaCO3, hematite) • Hydrostatic Pressure and pressure gradient • Equivalent Circulating Density (ECD) • Annular Velocity • Triplex Pump Output – bbl/stroke, bbl/min and flow rate • Kill Sheet – Kill Mud Weight, ICP and FCP, with safety margin • Bottoms Up – annular volume, strokes and time • Pipe Capacity & Displacement – open-ended and closed-end • Oil/Water Ratio – from retort readings, with oil or water to add to reach a target ratio • Rheology – PV, YP, apparent viscosity, n and K from Fann 600/300 readings • EMW & Pressure Gradient BUILT FOR THE FIELD • Step-by-step worked equation with your own numbers, plus the formula reference • Change units right inside each field – values convert automatically • Quick-value chips: barite, CaCO3, hematite, water, seawater, diesel, sack sizes, pump efficiency • Smart checks catch unit slips (e.g. 35 typed into an SG field) and impossible inputs • Values carry over between calculators: pump output feeds Bottoms Up and Annular Velocity, the new mud weight feeds Hydrostatic, ECD and Kill Sheet WELLS & HISTORY • Manage multiple wells (name, rig, field); each well keeps its own calculations and values • Every calculation is saved automatically in a searchable history, filtered by well, date or calculator • Export history to CSV (Excel) or a combined PDF PROFESSIONAL PDF REPORTS Input and result tables, the worked equation, the reference, the well, your name or company, the date and an app watermark – ready to share. UNITS & SETTINGS • Oilfield and metric units: ppg, SG, g/cm³, kg/m³, pcf, bbl, m³, gal, L, ft, m, in, mm, psi, bar, kPa, gpm, L/min, bbl/min, m³/min • Exact unit conversions • English and Arabic interface • Favorites and search on the home screen • Adjustable decimal places, light or dark theme • Works fully offline – no account, no ads, your data stays on your device Formulas follow standard oilfield references (Lapeyrouse, Formulas and Calculations for Drilling; IWCF kill sheet; API RP 13B) and are verified against published worked examples. Special thanks to Eng. Mahmoud Elbeltagy for contributing to the development of these calculations.

About

Max Drilling

Monitor drilling operations in real-time with instant access to active and historical well data. Visualize drilling parameters, view rig reports, and communicate securely with your team from anywhere.

Highlights
  • 1-second data streaming
  • Customizable data visualization
  • Time and depth views
  • Lagged channel tracing
  • Rig and well reports
  • Integrated chat
  • Collaborative notes
Features
Read full description

The new Max Drilling mobile app (formerly WellData MobileRT) provides easy access to active and historical well data so you can monitor your drilling operations from wherever you are. With NOV’s edge infrastructure and M/D Totco instrumentation, your data flows securely from sensor to screen—no third parties involved—so you see it instantly, in real time, with one-second resolution. Key Features: • 1-second data streaming: View real-time drilling data on your mobile device with less than a second of lag between the rig site and your screen (excluding satellite latency). • Customizable visualization: Configure strip charts and traces with flexible options for units, scaling, and more. All tags and channels available in the RigSense Electronic Drilling Recorder (EDR) are accessible, including data from integrated applications like Drilling Beliefs & Analytics and 3rd-party survey data. • Time and depth views: Access both active and historical well data by time or depth for full operational visibility. • Lagged channel tracing: Monitor channels such as gamma ray, methane, propane, total gas, and total gas normalized. • Rig and well reports: View IADC Reports (toursheets), Drilling Contractor Morning Reports, and well information including Bit Records and BHA Summaries. • Integrated chat: Communicate instantly between the rig and other Max Drilling mobile users. • Collaborative notes: View all rig notes or add your own to the official EDR notes in the time-series data. • Secure and compliant: Built on SOC 1 Type II–audited processes and end-to-end SSL/TLS encryption for secure access from anywhere. • Rig locations: View your wells on a map for quick spatial awareness and access directions to the location. • (Coming Soon) Integrated chat: Communicate instantly between the rig and other Max Drilling mobile users. If you experience any difficulties installing or using Max Drilling, please contact the Help Desk at WellDataSupport@nov.com or 1-855-935-5328.

Screenshots

Mud Engineer3 screens
Max Drilling4 screens

Verdict

The call

The clearest difference is price: Max Drilling at Free against Mud Engineer's $2.99. Max Drilling also leads on rating (3.2 vs 1.0) and update cadence (every 4 months vs every 25 months). Mud Engineer's advantage is review sentiment (100% vs 63%) and chart position (#75 vs unranked). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Max Drilling is free to download; Mud Engineer costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

ReceptionRating · Positive reviews · Number of ratings

Max Drilling holds the better App Store score, 3.2 against 1.0. That said, the two scores are not equally well evidenced: Max Drilling has 22 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 100% of Mud Engineer's written reviews are positive against 63% of Max Drilling's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Mud Engineer ships an update every 25 months, Max Drilling every 4 months. The most recent releases landed on November 6, 2026 and November 2, 2026 respectively.

Scorecard7 real differences · 4 level
Mud Engineer versus Max Drilling: the parameters behind the verdict, then further details
ParameterMud EngineerMax Drilling
Price$2.99Free — better
Rating1.0 (1 ratings)3.2 (22 ratings) — better
Positive reviews100.0% of reviews — better62.5% of reviews
Number of ratings122 — better
Update frequencyEvery 25 monthsEvery 4 months — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#75 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.015.0
Further details — not scored
Size32 MB208 MB
Age rating4+4+
Developerbader alshammariNOV Inc.

Customer experience

Mud Engineer

All ratings1 ratings
Positive0.0%
Neutral0.0%
Negative100.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

Max Drilling

All ratings22 ratings
Positive54.5%
Neutral0.0%
Negative45.5%
Written reviews8 reviews
Positive62.5%
Neutral0.0%
Negative37.5%

In-app purchases

None

Mud Engineer

No in-app purchases

None

Max Drilling

No in-app purchases

Questions

Is Mud Engineer free?
Mud Engineer costs $2.99, with no in-app purchases.
Is Max Drilling free?
Max Drilling is free to download, with no in-app purchases.
Which has better reviews, Mud Engineer or Max Drilling?
Max Drilling is rated higher. Mud Engineer averages 1.0 out of 5 from 1 ratings, while Max Drilling averages 3.2 from 22 ratings.
Do Mud Engineer or Max Drilling have ads?
Neither Mud Engineer nor Max Drilling shows ads.
Which is updated more often, Mud Engineer or Max Drilling?
Mud Engineer ships an update every 25 months, and Max Drilling every 4 months. Most recently, Mud Engineer was updated on November 6, 2026 and Max Drilling on November 2, 2026.

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