Comparison

Lease Operator Toolkit 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

Lease Operator Toolkit

Features
Read full description

Lease Operator Toolkit is a practical field companion designed specifically for oilfield lease operators and production personnel. It combines commonly used field calculations, workover utilities, and note-taking tools into one easy-to-use app so you can work faster and stay organized at the wellsite. Whether you are monitoring wells, calculating volumes, performing tubing integrity tests, or documenting field activity, Lease Operator Toolkit keeps essential tools in one place—right on your phone. Built by someone who works in the field, this app focuses on speed, clarity, and reliability when you need answers quickly. Core Tools Gas Volume Calculator, Estimate gas volumes quickly using field inputs. Spill Calculator – Pro, Calculate spill volumes and store results for later reference or reporting. Volume in Pipe, Estimate gas volume contained in pipe using pipe dimensions and temperature. Workover Assistant, Includes pipe tally tools to help track tubing and workover operations. H.I.T. Test Tracker, Record and trend Tubing Integrity Test data to monitor well performance. Field Notes, Capture and store notes directly from the field. Field Notes allow you to quickly document wellsite observations, operational details, and important reminders so information is always available when you need it. Designed for Real Field Conditions Simple and fast interface Works entirely on your device No accounts or logins required Built for production operators and field personnel Clean layout that works in both light and dark mode Privacy First Lease Operator Toolkit does not collect or transmit user data. All information entered into the app is stored locally on your device. Important Notice Lease Operator Toolkit is intended as a field reference tool only. All calculations should be verified using company standards, engineering practices, and operational procedures.

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

Lease Operator Toolkit4 screens
Cementing Engineer4 screens

Verdict

The call

The clearest difference is in-app purchases: Lease Operator Toolkit at none against Cementing Engineer's 2. Cementing Engineer's advantage is iOS requirement (15.0 vs 17.6). On price, 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. Lease Operator Toolkit asks for nothing beyond the download.

Scorecard2 real differences · 8 level
Lease Operator Toolkit versus Cementing Engineer: the parameters behind the verdict, then further details
ParameterLease Operator ToolkitCementing Engineer
PriceFreeFree
Rating—5.0 (3 ratings) — better
Positive reviews—100.0% of reviews
Number of ratings—3 — better
Update frequency—Fortnightly
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Subscription
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS17.615.0 — better
Further details — not scored
Size6 MB18 MB
Age rating4+4+
DeveloperKelly GayneauxRondo Wright

In-app purchases

None

Lease Operator Toolkit

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 Lease Operator Toolkit free?
Lease Operator Toolkit is free to download, with no in-app purchases.
Is Cementing Engineer free?
Cementing Engineer is free to download, with in-app purchases available.
Do Lease Operator Toolkit or Cementing Engineer have ads?
Neither Lease Operator Toolkit nor Cementing Engineer shows ads.

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