# OilField iHandbook — handy and easy calc.

> Oil and gas drilling and exploration calculation tool with API data. (iPhone/iPad app by zhandos uakanov.)

- Source: https://appshunter.io/ios/app/oilfield-ihandbook/id916850671 (this page in markdown: same URL + `.md`)
- Developer: [zhandos uakanov](https://appshunter.io/developer/625286817)
- Category: Reference, Business
- Price: $1.99
- Age rating: 4+
- Requires: iOS 17.6 · 8 MB
- Languages: American English
- Released: 2014-09-17
- Data updated: 2026-08-24
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/oilfield-ihandbook/id916850671/reviews.md

## What is OilField iHandbook?

OilField iHandbook application made for all specialist who are involved in Oil & Gas exploration and drilling. OilField iHandbook has most useful calculations which are using in daily Drilling and Oilfield operations. Also this application is the good supporting tool for oilfield Engineers.

Application builded by last updated API (American Petroleum Institute) Data.

Tested on oilfield of: US,Canada,UAE,Oman.

P.S.: Quick Calculation - Safe Operation Time.

The app uses formulas from Drilling Data Handbook (IFP Publications).

OilField iHandbook. include:

* Annular Volume; 
* Annular Velocity;
* Buoyancy Factor;
* Equivalent Circulating Density;
* Formation Fracture Gradient;
* Hydraulic Horse Power;
* Mud Gradient;
* Pipe Displacement;
* Pump Outputs;
* True Vertical Depth;
* Well Hydrostatic Pressure;
* Kill Weight Mud;


The following units are supported:
* Inches or Millimeters;
* Feet or Metres;
* Barrels or Cubic Meters;
* PPG or SG;
* PSI or kPa;

Please email us on info@oilfieldengineer.com for clarifications or corrections.

Good Luck in Your Job...

## Key features

- Annular Volume calculation
- Annular Velocity calculation
- Equivalent Circulating Density
- Formation Fracture Gradient
- Hydraulic Horse Power
- Kill Weight Mud calculation
- Support for multiple units

## Chart rankings

- #137 in Top Paid · Reference (US App Store)

## Recent user reviews (7 of 7)

All indexed reviews: https://appshunter.io/ios/app/oilfield-ihandbook/id916850671/reviews.md

### 1/5 — App doesn’t open

*2024-12-30*

Use to work great now it doesn’t at all and has been like this over a yr

**Developer response:** Thank you for your feedback and patience. We've recently released an update that resolves all reported issues and crashes. The app data has also been updated based on the latest API data. Please ensure you update to the latest version, and let us know if you encounter any further issues. We appreciate your support!

### 1/5 — App doesn’t open

*2023-05-22*

App crashes every time you try to open it

**Developer response:** Thank you for your feedback and patience. We've recently released an update that resolves all reported issues and crashes. The app data has also been updated based on the latest API data. Please ensure you update to the latest version, and let us know if you encounter any further issues. We appreciate your support!

### 1/5 — Scam

*2023-03-28*

App will not open

**Developer response:** Thank you for your feedback and patience. We've recently released an update that resolves all reported issues and crashes. The app data has also been updated based on the latest API data. Please ensure you update to the latest version, and let us know if you encounter any further issues. We appreciate your support!

### 1/5 — Junk

*2023-01-05*

Bought app and wouldn’t open. Scam.

**Developer response:** Thank you for your feedback and patience. We've recently released an update that resolves all reported issues and crashes. The app data has also been updated based on the latest API data. Please ensure you update to the latest version, and let us know if you encounter any further issues. We appreciate your support!

### 1/5 — Don’t work on iPhone X

*2022-11-29*

I bought it and not working

**Developer response:** Thank you for your feedback and patience. We've recently released an update that resolves all reported issues and crashes. The app data has also been updated based on the latest API data. Please ensure you update to the latest version, and let us know if you encounter any further issues. We appreciate your support!

### 1/5 — Not working

*2022-07-01*

Its not work

**Developer response:** Thank you for your feedback and patience. We've recently released an update that resolves all reported issues and crashes. The app data has also been updated based on the latest API data. Please ensure you update to the latest version, and let us know if you encounter any further issues. We appreciate your support!

### 1/5 — AV calculator

*2019-03-10*

The Annular velocity calculator is wrong! You have it multiplying instead of dividing by the bbl/ft. Please change and I’ll give it 5 stars.

**Developer response:** Thank you for your feedback and patience. We've recently released an update that resolves all reported issues and crashes. The Annular Velocity calculation logic was updated! We appreciate your support!

## Frequently asked questions about OilField iHandbook

### What is the price of OilField iHandbook?

OilField iHandbook is a paid application, priced at $1.99. This one-time purchase grants you access to all its features without recurring fees.

### What units does OilField iHandbook support?

OilField iHandbook supports a wide range of units including Inches or Millimeters, Feet or Metres, Barrels or Cubic Meters, PPG or SG, and PSI or kPa, catering to diverse international standards.

### Is OilField iHandbook available on Android devices?

Currently, OilField iHandbook is only supported on iPhone devices. Compatibility for Android and other platforms may be considered in future updates.

### How often is OilField iHandbook updated?

The last update for OilField iHandbook was on January 25, 2026, indicating a commitment to maintaining and improving the application. Users can expect updates to reflect the latest API data and user feedback.

### What specific calculations are included in OilField iHandbook?

OilField iHandbook includes calculations for Annular Volume, Annular Velocity, Buoyancy Factor, Equivalent Circulating Density, Formation Fracture Gradient, Hydraulic Horse Power, Mud Gradient, Pipe Displacement, Pump Outputs, True Vertical Depth, Well Hydrostatic Pressure, and Kill Weight Mud.

### Does OilField iHandbook contain advertisements?

No, OilField iHandbook is ad-free. As a paid application, it provides an uninterrupted user experience without any advertisements.

### What is the age rating for OilField iHandbook?

OilField iHandbook has an age rating of 4+. This indicates that the content is generally suitable for all audiences, with no mature themes or potentially disturbing material.

### Where can I find clarification or report corrections for OilField iHandbook?

For any clarifications or corrections regarding OilField iHandbook, you can email the developers directly at info@oilfieldengineer.com. They are responsive to user feedback for improving the application.

## Version history (last 5 releases)

### 1.3 — 2026-01-25

- improved calculation data;

### 1.2.1 — 2025-03-18

- Annular Velocity calculation logic was updated;

### 1.2 — 2025-03-18

- App was updated as per last API data;
- Included Decimal Convertor;

### 1.1 — 2014-10-04

This app has been updated by Apple to display the Apple Watch app icon.

* Formation Integrity Test
* Leak-Off test
* Number of Sacks (cement)
* Acronyms & Abbreviations

### 1.0 — 2014-09-17

No release notes.

## Apps similar to OilField iHandbook

| App | Rating | Price | Category |
| --- | --- | --- | --- |
| [Quail Tools](https://appshunter.io/ios/app/quail-tools/id1279372123) | 5.0 (22) | Free | Reference |

## More apps by zhandos uakanov

- [OilField Formulas iHandy Calc](https://appshunter.io/ios/app/oilfield-formulas-ihandy-calc/id875486327)
- [OilField Downhole Tools](https://appshunter.io/ios/app/oilfield-downhole-tools/id878961481)
- [Directional Drilling Calc.](https://appshunter.io/ios/app/directional-drilling-calc/id885580803)
- [Shift Calendar for Oilfield](https://appshunter.io/ios/app/shift-calendar-for-oilfield/id894353734)
- [OilField Annular Volume Pro](https://appshunter.io/ios/app/oilfield-annular-volume-pro/id921257545)

All apps by zhandos uakanov: https://appshunter.io/developer/625286817

## Related topics

[oilfield ihandbook](https://appshunter.io/ios/topics/oilfield-ihandbook) · [ihandbook](https://appshunter.io/ios/topics/ihandbook) · [oilfield calc](https://appshunter.io/ios/topics/oilfield-calc)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-24.*