# RAFTER Construction Calculator

> Cut it right the first time

Canonical page: [https://chrome-stats.com/d/id6778809913](https://chrome-stats.com/d/id6778809913)

## Overview

- **ID:** `id6778809913`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Aditya Wirayudha
- **Category:** Utilities
- **Version:** 1.0
- **Last updated:** 2026-06-15
- **First published:** 2026-06-15
- **Size:** 999 KB
- **Data as of:** 2026-09-11
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/rafter-construction-calculator/id6778809913)
- **Website:** [https://apps.cilukba.com](https://apps.cilukba.com/)
- **Privacy policy:** [https://apps.cilukba.com/privacy](https://apps.cilukba.com/privacy)

## Description

Pay once, own it forever. Feet-inch-fraction math, rafters, stairs, squaring and board feet — instant, offline, with the working shown on every answer.

The construction calculator apps tradespeople relied on for years now charge rent — $40 every year, forever, for the same math. Rafter is the alternative: pay once, own it forever.

Rafter does jobsite math the way you think it: feet, inches, and fractions — on a real keypad, with the working shown on every answer.

PAY ONCE. NO SUBSCRIPTION. NO ACCOUNT. NO ADS. WORKS OFFLINE.

FEET-INCH-FRACTION CALCULATOR
- Add, subtract, multiply, divide in feet-inches-fractions (1/8", 1/16", 1/32")
- Full dimensional math: length × length = area, area × depth = volume — straight to cubic yards
- Tap the display to convert: decimal feet, inches, yards, meters, centimeters, millimeters
- The honest ≈ mark: when a result can't land exactly on a fraction, Rafter tells you

RAFTERS — Common, hip/valley, and jack lengths from pitch and span. Plumb and level cut angles. Jack table at 12/16/19.2/24" OC. Pitch ↔ degrees ↔ percent, live. The framing-square per-foot number on every result so you can verify it yourself.

STAIRS — Total rise in, full layout out: risers, treads, total run, stringer length, and the stock board to buy. Code check against IRC defaults (editable) with clear pass/fail badges. Adjust riser count and watch everything recompute.

SQUARE & LUMBER — Diagonal squaring with out-of-square deviation. Board feet with cost, the way lumber is actually sold.

PAPERLESS TAPE — Every answer lands on the tape automatically. Recall any number with a tap. Star and label figures by job. Text or CSV the whole list to the contractor.

BUILT FOR THE JOBSITE
- Huge keys, extreme contrast, readable in direct sun
- Instant answers — no Calculate button, no spinner, no signal needed
- Siri & Shortcuts: ask for a rafter length or stair layout hands-free
- Your numbers never leave your phone. No data collection. Nothing to log into.

One price. Every future update included. That's the whole deal.

## Rankings

- #2,091,215 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6778809913)