Comparison

Mud Engineer vs Corva

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

Corva

This application provides real-time insights and tools for optimizing oil and gas drilling and completions operations. It offers dynamic visualizations and data-driven decision-making to enhance efficiency and well performance for teams.

Highlights
  • Digital Drilling visualization
  • Real-time completions data
  • Drilling dynamics tracking
  • Treatment Plot insights
  • AI-powered tools
  • Operational transparency
Features
Read full description

Discover the future of oil & gas operations with Corva, the ultimate app for real-time drilling and completions optimization. Designed for seamless collaboration and unparalleled insights, Corva empowers your team with the tools to make data-driven decisions, enhance efficiency, and maximize well performance. Key Features: Digital Drilling Visualize your rig operations dynamically and monitor critical metrics like depth, and ROP in real-time. Stay ahead with actionable insights that boost operational efficiency. Digital Completions Experience a redefined frac operations view with real-time pressure data, fleet performance metrics, and a full zipper frac overview for unparalleled decision-making. Traces Track drilling dynamics, optimize processes, and gain a deeper understanding of downhole performance with live data visualization. Treatment Plot Real-time wellhead pressure, fluid volumes, and proppant insights keep you in control and ensure optimized completions. Why Corva? From the rig floor to corporate offices, Corva bridges the gap between data and action. With cutting-edge visualizations, AI-powered tools, and unmatched transparency, your team will have everything needed to drive operational excellence. Download Corva today and elevate your oil & gas operations to a whole new level!

Screenshots

Mud Engineer3 screens
Corva4 screens

Verdict

The call

The clearest difference is price: Corva at Free against Mud Engineer's $2.99. Corva also leads on rating (5.0 vs 1.0) and update cadence (every 9 days vs every 25 months). Mud Engineer's advantage is chart position (#75 vs unranked). On ratings volume, ads, in-app purchases and device support 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

Corva 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

Corva holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively.

UpkeepUpdate frequency

Mud Engineer ships an update every 25 months, Corva every 9 days. The most recent releases landed on November 6, 2026 and October 30, 2026 respectively.

Scorecard5 real differences · 6 level
Mud Engineer versus Corva: the parameters behind the verdict, then further details
ParameterMud EngineerCorva
Price$2.99Free — better
Rating1.0 (1 ratings)5.0 (2 ratings) — better
Positive reviews100.0% of reviews—
Number of ratings12 — better
Update frequencyEvery 25 monthsEvery 9 days — better
AdsNoNo
In-app purchasesNoNo
MonetizationPaidFree — better
Best chart rank#75 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.0 — better15.1
Further details — not scored
Size32 MB179 MB
Age rating4+4+
Developerbader alshammariCorva

Customer experience

Mud Engineer

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

Corva

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Mud Engineer

No in-app purchases

None

Corva

No in-app purchases

Questions

Is Mud Engineer free?
Mud Engineer costs $2.99, with no in-app purchases.
Is Corva free?
Corva is free to download, with no in-app purchases.
Which has better reviews, Mud Engineer or Corva?
Corva is rated higher. Mud Engineer averages 1.0 out of 5 from 1 ratings, while Corva averages 5.0 from 2 ratings.
Do Mud Engineer or Corva have ads?
Neither Mud Engineer nor Corva shows ads.
Which is updated more often, Mud Engineer or Corva?
Mud Engineer ships an update every 25 months, and Corva every 9 days. Most recently, Mud Engineer was updated on November 6, 2026 and Corva on October 30, 2026.

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