# DD Tools

> Mobile calculator app for oilfield professionals with specialized industry calculations. (iPhone/iPad app by Michael Blake.)

- Source: https://appshunter.io/ios/app/dd-tools/id1443250005 (this page in markdown: same URL + `.md`)
- Developer: [Michael Blake](https://appshunter.io/developer/1443250004)
- Category: Business, Utilities
- Price: $19.99
- Rating: 4.80/5 from 6 App Store ratings · 4 written reviews indexed
- Age rating: 4+
- Requires: iOS 13.2 · 1 MB
- Languages: American English
- Released: 2018-11-20
- Data updated: 2026-06-10
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/dd-tools/id1443250005/reviews.md

## What is DD Tools?

DD Tools is an iOS app designed to make it easy for oilfield professionals to run every day calculations on their phone. Currently, the app has calculator screens for Ouija, Build Rate Needed, Effective Toolface/Dogleg, Project Ahead, Amount to Slide, Total Flow Area & Pump Output.

## Key features

- Oilfield calculations
- Ouija calculator
- Build Rate Needed calculator
- Effective Toolface/Dogleg calculator
- Project Ahead calculator
- Amount to Slide calculator
- Total Flow Area & Pump Output calculator

## Recent user reviews (4 of 4)

All indexed reviews: https://appshunter.io/ios/app/dd-tools/id1443250005/reviews.md

### 5/5 — Spear2D

*2022-05-16*

Great App!!! Especially for these South texas fast hole pads!

### 5/5 — Great app!

*2020-02-23*

Works like you need it to. Developer is very responsive! Thanks for a great app!

**Developer response:** There will be a new version today that addresses this issue. The placeholder text is a light gray in version 2.0 due to the 'Dark Mode' change in iOS apps. The new version (2.1) goes back to a red placeholder. Thanks!

### 4/5 — Attn:

*2020-02-22*

The new update doesn’t show anything in the boxes on iPhone. Just black empty boxes where you type the numbers. Not sure where to put inc, azm, or tvd.

The update did fix the problem and now can see the text in the boxes, thanks.

**Developer response:** Version 2.1 update should be ready and available on the App Store. That version goes back to the red text instead of the dark.

### 5/5 — Directional App

*2019-10-28*

This app is for all directional drillers it is on point and very much the fast pace to go , the developer i know on a personal level and he is one of the the few i know that is on point so go ahead n buy it and support a fellow directional driller !!

## Frequently asked questions about DD Tools

### What is DD Tools?

DD Tools is a paid iOS application designed for oilfield professionals. It offers specialized calculators for common industry tasks, aiming to simplify daily operations.

### What devices does DD Tools support?

DD Tools is compatible with iPhone and iPod devices, running on iOS.

### How much does DD Tools cost?

DD Tools is available for a one-time purchase price of $19.99.

### When was DD Tools last updated?

The latest version of DD Tools, 2.1, was released on February 21, 2020.

### What is the age rating for DD Tools?

DD Tools has an age rating of 4+, making it suitable for a wide range of users.

### What specific calculations does DD Tools offer?

DD Tools includes calculators for Ouija, Build Rate Needed, Effective Toolface/Dogleg, Project Ahead, Amount to Slide, and Total Flow Area & Pump Output.

### What is the user rating for DD Tools?

DD Tools has received an average rating of 4.8 stars from 6 user reviews.

### Is DD Tools available on Android?

Based on the provided information, DD Tools is exclusively an iOS application and is not available on Android devices.

## Version history (last 4 releases)

### 2.1 — 2020-02-21

Updated the text color for the place holder text due to difficulty in seeing the text.

### 2.0 — 2020-02-12

Changed the UI and updated the math behind the scenes. Also, made some updates due to latest iOS version.

### 1.02 — 2019-01-30

Minor bug update.

### 1.0 — 2018-11-19

No release notes.

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## More apps by Michael Blake

- [DDToolsPro](https://appshunter.io/ios/app/ddtoolspro/id6755078356)

All apps by Michael Blake: https://appshunter.io/developer/1443250004

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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.*