iPhone Screenshots


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.

What’s New

Version 2.1

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

Ratings and Reviews

4.8 out of 5
4 Ratings

4 Ratings

JeremyD2019 ,

Directional App

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 !!

plzfixyourapp ,

Great app!

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!

Ferris for real ,


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.


Michael Blake
1.3 MB

Requires iOS 13.2 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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