Rafter Tools+ for iPhone-iPad is a rafter calculator for complex roof framing angles that other roof framing calculators don't offer. Calculating common rafters with a construction calculator is fairly easy, but to be a master carpenter you need more roof framing angle information then the construction calculators offers. With the Rafter Tools-Plus app, you'll be able to calculate all of the complex angles for roof framing.

The calculator displays the hip rafter plumb line shift dimensions to precisely layout hip rafters for equal pitched or irregular hip roofs with any eave angle (0° - 180°). Calculate and layout the witches cut precisely with Rafter Tools-Plus (Square Tail Fascia) using the hip rafter plumb line shift dimensions.

Display the hip rafter roof framing angles with easy to use Framing Square Usage. Calculates the lengths of common rafters, jack rafters, and hip rafters. With ridge and hip rafter width deductions. Use it to calculate Pentagonal, Hexagonal or Octagonal Roofs.

Timber Framing Angles calculated from Bartok, Hawkindale, Martindale and McKibben-Gray Hip-Valley Roof Ratios Angle Formulas. Timber Framing Angles definition are just a click away in the app.

Standard Rake Walls and Hip Rake Walls rotated into the roof surface plane.
Devers-Canted Hip Rafters, Purlin Rafters

Round Tower Framing, Octagonal Framing, Bay Window Framing

What's New

Version 1.1.7

Added angle P7.

Ratings and Reviews


Bad app

Carpenter for 15 years and now I’m in IT, horrible app and I want my money back.


Great Teaching Tool!!!

Hip roof systems are by no means easy and with all the helpful articles and drawings that are included in this app you will be cutting hips in no time! Screen shot of this program does no justice to how many angles and information is given. This app is extremely optimized for timber framing as you are able to change the dimensions of your hip and jack rafters, plus explains all the timber framing angles. If you ever plan on cutting a hip take the guess work out of it and by this app!!

Kitty bisons

Great app

Awesome. It’s about time there was an app for complex roof framing.


Sim Ayers
72.7 MB
Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© SBE Builders


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

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