# M-I SWACO

> Industry-specific calculations and reference guide for HDD, mining, and waterwell professionals. (iPhone/iPad app by Gary Matula.)

- Source: https://appshunter.io/ios/app/m-i-swaco/id499835337 (this page in markdown: same URL + `.md`)
- Developer: [Gary Matula](https://appshunter.io/developer/499835340)
- Category: Reference, Utilities
- Price: Free
- Rating: 5.00/5 from 4 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 6.0 · 16 MB
- Languages: American English
- Released: 2012-02-09
- Data updated: 2026-06-10
- Monetization: free
- User reviews in markdown: https://appshunter.io/ios/app/m-i-swaco/id499835337/reviews.md

## What is M?

The original app designed specifically for the HDD, mining and waterwell industry. It puts basic calculations and reference material at the fingertips of the rig crews. Calculations such as pump output, hole volume, annular volume, annular velocity are critical to the economic success of the project. The Reference Guide includes all of the reference materials and basic calculators needed so the rig crews can do their jobs easier, faster and safer.

## Key features

- Pump output calculations
- Hole volume calculations
- Annular volume calculations
- Annular velocity calculations
- Industry reference materials
- Rig crew tools

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/m-i-swaco/id499835337/reviews.md

### 4/5 — Pump output

*2014-07-30, version 2.0*

Great app needs to include more pump sizes on pump output.

### 1/5 — Useless

*2013-05-03, version 1.1*

Only has the most basic information, and virtually no oilfield calculations. There are much better apps out there.

### 2/5 — Very Basic

*2012-06-12, version 1.1*

Pretty basic. Doesn't provide enough of anything to be very useful. Will stick with my ancient TI-86 now since its already programmed.  

Thanks anyway.

### 3/5 — Right direction

*2012-03-15, version 1.0*

It is so cool to see the company I work for put out an iPhone ap. This ap needs some work though. It needs to have the option for custom units not just US or metric. This ap would also be cool if it had lots more reference guides like tubular sizes, all mi products, etc. nice work though!

## Frequently asked questions about M

### What calculations does M-I SWACO offer?

M-I SWACO offers critical calculations such as pump output, hole volume, annular volume, and annular velocity, essential for the economic success of projects in the HDD, mining, and waterwell industries.

### Is M-I SWACO available on Android devices?

Currently, M-I SWACO is supported on iPhone and iPod devices. Information regarding Android compatibility is not provided in the app's current data.

### How often is M-I SWACO updated?

The latest version of M-I SWACO is 2.3, which was last updated on November 26, 2014. This indicates infrequent updates.

### What is the age rating for M-I SWACO?

M-I SWACO has an age rating of 4+, making it suitable for a wide range of users.

### What is the user sentiment for M-I SWACO?

M-I SWACO has received overwhelmingly positive feedback, indicated by its perfect rating of 5.0 stars from 4 ratings.

### Does M-I SWACO have ads?

The provided data does not specify whether M-I SWACO contains advertisements. However, it is listed as free with no in-app purchases.

### When was M-I SWACO first released?

M-I SWACO was originally released on February 9, 2012, making it a long-standing tool in its industry.

### Who developed M-I SWACO?

M-I SWACO was developed by Gary Matula.

## Version history (last 5 releases)

### 2.3 — 2014-11-26

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

New Icon

### 2.2 — 2014-10-09

- Bug Fixes.

### 2.1 — 2014-09-16

Minor bug fixes.

### 2.0 — 2014-07-30

Added equations include dilution factors, grouting, bottoms-up time and mud weight-up. Also results are easily converted between metric and Imperial units within each equation.

### 1.1 — 2012-04-09

Minor Bugs fixed in the previous Version.

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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 2026-06-10.*