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THE most advanced, feature-rich, intuitive & user-friendly construction app available. Capable of handling even the most demanding construction projects.

With its easy-to-use layout & features, it blows expensive stand-alone construction calculators out of the water; and at a fraction of the cost!

Whether an experienced tradesman or novice DIYer, you will find Carpenter’s Helper the perfect companion for every project, in the office and in the field.


• Calculator: Includes all of the features you would expect to find on an advanced Construction Calculator, but redesigned and optimized for the touch screen.

Easily calculate linear, square & cubic measurements in English (Yards, Feet, Inches, Inch Fractions [up to x/128”]) & Metric (Millimeters, Centimeters, Meters), and convert easily between the two unit modes with a convenient [E/M] toggle.

Store & recall triangular measurements to calculate roof pitch, rafter lengths, stair lengths, and more with the convenient [Pitch], [Rise], [Run] and [Diagonal] buttons. When any 2 values are stored, the other 2 are generated automatically!

The [Tape] feature keeps an easy-to-read list of your calculations for error-checking, while the Memory Bank feature allows you to Add, Subtract, and recall stored values with a running ticker displayed in the LCD area.

Plus we just added a NEW Quick-List feature, which allows you to label and store often-used values for quicker entry into your equation!

• Notepad: Keep important notes within one tap of your calculator, supporting multiple pages and exporting to PDF.

• Projects:
Create lists of data in Text-Only, Simplified, or Detailed lists, and store in organized Projects. Useful for take-offs, estimating, budgets, material lists, etc. Lists can even be tabulated to include running totals on the bottom!

Not only does it keep track of important project info & create powerful lists, but you can also store project documents (like budgets, contracts, plans, etc.) & images (either by attaching images from you photo library or taking new ones).

And of course you can Print or export your Project data via email as a PDF!

• Quick-Jobs: Graphical interface to easily calculate all kinds of construction projects, large or small. With just a few known parameters, Quick-Jobs will automatically fill-in and calculate the rest of the project for you.

These Quick-Jobs are included:

-Conc. Block
-Fencing (Imperial-Mode Only)
-Decking (Imperial-Mode Only)
-Wall Framing (Imperial-Mode Only)
-Board Feet Calc. (Imperial-Mode Only)

You can also export all of your QJ data to be included with a Project, or export separately.


With Builder’s Helper, you’ll always have the calculating power you need on you, every time you need it. And with all of the additional features, you’ll be able to take estimating, take-offs, & on-site job performance to a whole new level!

What's New

Version 3.4

Fixed bugs that would cause the app crash if zero values were chosen in QJ views
Fixed bugs that cause the app to crash when Rafters QJ view is opened
Fixed some bugs that may cause the app to crash upon initializing
Fixed a bug that causes Project Info view to crash when app doesn't have access to Address Book on the device
Fixed a bug that may cause Stairs QJ view to crash
Fixed a bug that may cause Rafter QJ view crash when a big number of jacks is generated
Fixed a bug in Rafters QJ: View was scrollable horizontally and out of view

Ratings and Reviews

2.6 out of 5

7 Ratings

7 Ratings

Waste of money fraudulent.


This is not a true budget software. All it does is keep adding. You can’t show a running totals of what you have spent against your budget. I tried to find an email for support and I don’t know if these people want business and to help because there is no email and their support link takes you to a generic site that does NOTHING. I feel I was ripped off. Seriously feel like this is a fraudulent product.

Common Rafter Calculator NG


The rafter calculator simply does not work. I was looking to calculate the lenght of a common rafter but it does not work. I plugged in the run (3' 01/2") and the pitch (3/12) the answer was incorrect. Had to resort to the old way to calculate the correct answer - 3' 1 5/8"

Although the BH manual says I can plug in the pitch in an n/12, once I select the P- x/12, the calculator says 0 5/8".

Support from the author does not exist. 15 bucks down the drain.


HomeBuilder CO

This is my go to calculator. Quick jobs is great for quick calculations in the field.


My Pie Interactive
18 MB
Requires iOS 7.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© 2015 My Pie Interactive


  • Family Sharing

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

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