Comparison

Volumetric Method vs Workover Assistant

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

Head to head
About

Volumetric Method

Features
Read full description

This app is designed for both iPhone and iPad. This application uses the basic calculations of the Volumetric Method to control oil wells after the occurrence of kick during drilling operations on landing rigs (Onshore). - Starting on version 1.1, this app is optimized for horizontal and directional wells. It imports data files from our apps: (Driling Hydraulics, Drilling Simulators, Kick Tolerance, Kick Game, MPD Simulator and Well Control Simulators) available for sale in our portfolio on the App Store. It is can be applied on the oilfield and also help in the understanding of the Volumetric Method of well control. This app was developed based on existing spreadsheets. There is no comparison with any other software. Our goal was to create a low-cost application with the help of experts to share with drilling engineers, technicians, drillers, students and teachers of drilling engineering. There is no intention to replace the professional softwares. You can contribute with suggestions for improvements, correcting the translation to english, reporting bugs and spreading it to your friends. Thanks DISCLAIMER: These tools & materials are provided 'as is' without warranties of any kind, express or implied. Please verify the tools provided by this application by yourself before you use them. Ensure you understand the impact of using these tools. Any use you choose to make of these tools & materials is undertaken by you entirely at you own risk.

About

Workover Assistant

This utility app assists oil and gas field personnel with essential calculations for well workovers. It provides tools for hydrostatic pressure, internal capacity, and other critical functions, serving as a convenient resource for rig site or office use.

Highlights
  • Hydrostatic pressure calculations
  • Internal capacity calculations
  • Oil and gas well workover tools
  • Rig site and office utility
  • Accurate field calculations
Features
Read full description

Workover Assistant is designed to help field personnel perform quick, accurate calculations related to oil and gas well workovers. It includes tools for hydrostatic pressure, internal capacity, and other common workover functions—making it a handy companion for the rig site or office.

Screenshots

Volumetric Method4 screens
Workover Assistant4 screens

Verdict

The call

The clearest difference is price: Workover Assistant at Free against Volumetric Method's $19.99. Volumetric Method's advantage is iOS requirement (11.0 vs 16.6). On update cadence, 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

Workover Assistant is free to download; Volumetric Method costs $19.99 up front. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

Volumetric Method ships an update every 38 months, Workover Assistant every 58 months. The most recent releases landed on September 10, 2026 and June 5, 2026 respectively.

Scorecard2 real differences · 7 level
Volumetric Method versus Workover Assistant: the parameters behind the verdict, then further details
ParameterVolumetric MethodWorkover Assistant
Price$19.99Free — better
Rating—5.0 (2 ratings) — better
Number of ratings—2 — better
Update frequencyEvery 38 months — betterEvery 58 months
AdsNoNo
In-app purchasesNoNo
Monetization—Free
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS11.0 — better16.6
Further details — not scored
Size16 MB3 MB
Age rating4+4+
DeveloperCarlos MouraKelly Gayneaux

In-app purchases

None

Volumetric Method

No in-app purchases

None

Workover Assistant

No in-app purchases

Questions

Is Volumetric Method free?
Volumetric Method costs $19.99, with no in-app purchases.
Is Workover Assistant free?
Workover Assistant is free to download, with no in-app purchases.
Do Volumetric Method or Workover Assistant have ads?
Neither Volumetric Method nor Workover Assistant shows ads.
Which is updated more often, Volumetric Method or Workover Assistant?
Volumetric Method ships an update every 38 months, and Workover Assistant every 58 months. Most recently, Volumetric Method was updated on September 10, 2026 and Workover Assistant on June 5, 2026.

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