Volumetric Method vs Workover Assistant
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Volumetric Method
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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.
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.
- Hydrostatic pressure calculations
- Internal capacity calculations
- Oil and gas well workover tools
- Rig site and office utility
- Accurate field calculations
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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
Verdict
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
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.
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.
| Parameter | Volumetric Method | Workover Assistant |
|---|---|---|
| Price | $19.99 | Free — better |
| Rating | — | 5.0 (2 ratings) — better |
| Number of ratings | — | 2 — better |
| Update frequency | Every 38 months — better | Every 58 months |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | — | Free |
| Devices | iPhone, iPad, iPod — better | iPhone, iPad |
| Requires iOS | 11.0 — better | 16.6 |
| Further details — not scored | ||
| Size | 16 MB | 3 MB |
| Age rating | 4+ | 4+ |
| Developer | Carlos Moura | Kelly Gayneaux |
In-app purchases
Volumetric Method
No in-app purchases
Workover Assistant
No in-app purchases
Questions
Is Volumetric Method free?
Is Workover Assistant free?
Do Volumetric Method or Workover Assistant have ads?
Which is updated more often, Volumetric Method or Workover Assistant?
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