Volumetric Method vs O
Price, ratings, monetisation and update history for both apps, side by side โ 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.
O
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Some of the main features of the application are: โข Calculator: easily define what the geometrical parameters for rock blasting should be. โข Safety: Measure the ground vibration and acoustics levels of the blast site. โข Data tables: Find out acceptable levels of vibration, glossary used in the explosive industry, linear charge of the explosive according to different diameters and desities of explosive and etc. โข Products: Learn more about the range of solutions O-Pitblast can offer you to optimize your drilling and rock blasting solutions.
Screenshots
Verdict
The clearest difference is price: O at Free against Volumetric Method's $19.99. O also leads on update cadence (every 2 weeks vs every 38 months). Volumetric Method's advantage is ads (none vs shown). On in-app purchases, device support and iOS requirement there is nothing between them.
Scored on Price ยท Rating ยท Positive reviews ยท Number of ratings ยท Update frequency ยท Ads ยท In-app purchases ยท Monetization ยท Best chart rank ยท Devices ยท Requires iOS
O 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, O every 2 weeks. The most recent releases landed on September 10, 2026 and December 23, 2025 respectively.
| Parameter | Volumetric Method | O |
|---|---|---|
| Price | $19.99 | Free โ better |
| Update frequency | Every 38 months | Every 2 weeks โ better |
| Ads | No โ better | Yes |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 11.0 โ better | 12.0 |
| Further details โ not scored | ||
| Size | 16 MB | 52 MB |
| Age rating | 4+ | 4+ |
| Developer | Carlos Moura | O-Pitblast, Lda. |
In-app purchases
Volumetric Method
No in-app purchases
O
No in-app purchases
Questions
Is Volumetric Method free?
Is O free?
Do Volumetric Method or O have ads?
Which is updated more often, Volumetric Method or O?
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