Support

Long-press any key in the app for its help. The essentials are below.

Entering dimensions

5 Feet 3 Inch 1 / 2 Inch gives 5' 3-1/2". 42 Inch is 42 inches, shown as 3' 6". 7 . 5 Feet is decimal feet. Press Feet again on a value to make square feet, again for cubic feet. Conv Feet toggles feet-inch-fraction and decimal feet; Conv Yds, Conv Inch convert the display.

Rafters

7 Inch Pitch sets 7/12. Enter the run (half the span) with Run, then Diag for the common rafter, again for the plumb cut, again for the level cut. Hip/V gives the regular hip or valley and its cuts; Jack gives the spacing, the increment and each jack length.

Stairs

Enter the floor-to-floor rise with Rise (and the run with Run if you know it), then press Stair repeatedly: riser height, number of risers, riser over/under, tread width, treads, tread over/under, stairwell opening, stringer, incline. Conv Stair keeps every riser at or under your desired riser height (set it in Settings, default 7-1/2").

Concrete

Length × width × depth, for example 36 Feet 3 Inch × 11 Feet 6 Inch × 4 Inch =, then Conv Yds for cubic yards. Enter the price per yard and press Cost. Bag counts use the bag size from Settings.

Fractions

Results round to the resolution in Settings (default 1/16). Shortcuts: Conv 2 halves, Conv 4 quarters, Conv 8 eighths, Conv 1 sixteenths, Conv 3 32nds, Conv 6 64ths.

Free and Pro

Dimensional math and conversions are free without limit. Project keys (stairs, rafters, circles, concrete, cost, board feet) allow three solutions a day; Pro removes the limit with one purchase that works on iPhone, iPad and Mac. Use Restore purchase on a new device. Refunds are handled by Apple at reportaproblem.apple.com.

Found a wrong answer?

Email the keystrokes and the expected value. Every reported case becomes a permanent automated test.

Contact

Email forrest@qqai.ai. We answer within two business days.