Bangon is a construction calculator built for the way you measure on the job. Enter feet, inches, and sixteenths directly, or switch to metric. FIVE TOOLS, ONE KEYPAD Calc: add, subtract, multiply, and divide in feet-inch-sixteenths or metric. Volume: figure concrete in cubic yards for slabs, footings, walls, and piers. Stairs: lay out risers and treads from your total rise. Rafter: get rise, rafter length, and angle from a roof pitch. Spacing: space pickets, balusters, or joists evenly across any run. BUILT FOR THE WORK Imperial results rounded to the nearest 1/16″ History of your last 60 calculations Undo when you hit the wrong key Remembers your units and last tool ONE PRICE, NOTHING ELSE Pay once and it's yours. No subscriptions, no in-app purchases, no ads. PRIVATE BY DESIGN Bangon never connects to the internet. No accounts, no tracking, no analytics. Your history stays on your iPhone. Bangon is a calculating aid. Always check measurements before cutting or ordering, and confirm your work meets local building codes. Requires iOS 17 or later.