Comparison

Gas Volume Calc vs Cementing Engineer

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

Head to head
About

Gas Volume Calc

This utility estimates natural gas flow rate using standard orifice meter calculations. It's designed for field use by operators, technicians, and engineers, combining meter geometry, flowing conditions, and gas composition for quick, reliable estimates.

Highlights
  • Estimates natural gas flow rate (MCFD)
  • Uses standard orifice meter calculations
  • Combines meter geometry, flowing conditions, and gas composition
  • Provides reliable flow estimates in seconds
  • Simple and dependable field workflow
Features
Read full description

Orifice Calc is a field-ready utility for estimating natural gas flow rate (MCFD) using standard orifice meter calculations. Designed for operators, technicians, and engineers, the app combines meter geometry, flowing conditions, and gas composition inputs to produce reliable flow estimates in seconds. Whether you are troubleshooting production, verifying measurements, or performing quick field calculations, Orifice Calc provides a simple and dependable workflow.

About

Cementing Engineer

This app is a field calculator for oilfield cementing operations. It allows users to input wellbore geometry and slurry details to get live, updated calculations for volumes, pressures, and pump schedules. The app also features a live well schematic and a tally book for saving and recalling job details.

Highlights
  • Field calculator for oilfield cementing
  • Live, updating calculations for volumes and pressures
  • Wellbore geometry and slurry stack input
  • Derived results with detailed math
  • Live well schematic
  • Tally Book for saving and recalling jobs
  • Offline functionality
Features
Read full description

Cementing Engineer is a field calculator for oilfield cementing operations, built by a cementer for cementers. The app requires an auto-renewable in-app subscription after the 7-day free trial to access the calculator, Tally Book, saved jobs, schematics, and derived cementing results. Pick the job - conductor, surface, intermediate, production, two-stage, drilling or production liner, balanced plug, kick-off plug, plug & abandon, or Bradenhead squeeze - enter the wellbore geometry and slurry stack, and every number updates live as you type. DERIVED RESULTS, SHOWN WITH THE MATH - Annular, shoe track, and displacement volumes with the capacity factors behind each number - Fluid placement tops and returns at surface - Volume calculations by slurry with sacks and totals - Pump schedule with rates and durations - Thickening time requirements - Hydrostatic, differential, lift, and bump pressures with burst limits - Mix water and total water requirements LIVE WELL SCHEMATIC A measured-depth schematic of casing, open hole, and fluid placement that redraws as the design changes, including two-stage and liner jobs. TALLY BOOK Save any job to the Tally Book: a browsable log of every well with its full design, well information, schematic, and complete derived results. Reopen any saved job straight into the calculator. WORKS IN THE FIELD Calculations run on the device, so the math works with no signal at the wellsite. Sign in with Apple or Google to keep your Tally Book synced across your devices. SUBSCRIPTION REQUIRED AFTER TRIAL Start with a 7-day free trial. After the trial, Apple automatically bills the selected plan unless canceled before renewal: $9.99/month or $79.99/year. Cancel anytime in your App Store account settings. Terms of Use: https://cement-phone-calculator.pages.dev/terms Privacy Policy: https://cement-phone-calculator.pages.dev/privacy Field estimate only - verify final volumes, pressures, and regulatory requirements before pumping.

Screenshots

Gas Volume Calc4 screens
Cementing Engineer4 screens

Verdict

The call

The clearest difference is in-app purchases: Gas Volume Calc at none against Cementing Engineer's 2. Cementing Engineer's advantage is update cadence (fortnightly vs every 61 months) and rating (5.0 vs 4.7). On price, ratings volume, ads 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

Both are free to download. Cementing Engineer sells 2 in-app purchases, starting at $9.99 per month. Gas Volume Calc asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Cementing Engineer holds the better App Store score, 5.0 against 4.7. Both are backed by a comparable volume of ratings — 3 and 4 respectively.

UpkeepUpdate frequency

Gas Volume Calc ships an update every 61 months, Cementing Engineer fortnightly. The most recent releases landed on November 2, 2026 and October 31, 2026 respectively.

Scorecard5 real differences · 5 level
Gas Volume Calc versus Cementing Engineer: the parameters behind the verdict, then further details
ParameterGas Volume CalcCementing Engineer
PriceFreeFree
Rating4.7 (3 ratings)5.0 (4 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings34 — better
Update frequencyEvery 61 monthsFortnightly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.115.0 — better
Further details — not scored
Size18 MB18 MB
Age rating4+4+
DeveloperKelly GayneauxRondo Wright

Customer experience

Gas Volume Calc

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Cementing Engineer

All ratings3 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Gas Volume Calc

No in-app purchases

2 purchases

Cementing Engineer

Subscriptions2
  • Pro Monthly7 Days trial$9.991 Month
  • Pro Annual7 Days trial$79.991 Year

Questions

Is Gas Volume Calc free?
Gas Volume Calc is free to download, with no in-app purchases.
Is Cementing Engineer free?
Cementing Engineer is free to download, with in-app purchases available.
Which has better reviews, Gas Volume Calc or Cementing Engineer?
Cementing Engineer is rated higher. Gas Volume Calc averages 4.7 out of 5 from 3 ratings, while Cementing Engineer averages 5.0 from 4 ratings.
Do Gas Volume Calc or Cementing Engineer have ads?
Neither Gas Volume Calc nor Cementing Engineer shows ads.
Which is updated more often, Gas Volume Calc or Cementing Engineer?
Gas Volume Calc ships an update every 61 months, and Cementing Engineer fortnightly. Most recently, Gas Volume Calc was updated on November 2, 2026 and Cementing Engineer on October 31, 2026.

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