# Framing Calc: Rafter & Stairs — Rafter & Stair Calculator

> Rafter & Stair Calculator (iPhone/iPad app by Gun woo Kim.)

- Source: https://appshunter.io/ios/app/framing-calc-rafter-and-stairs/id6786981827 (this page in markdown: same URL + `.md`)
- Developer: [Gun woo Kim](https://appshunter.io/developer/1700263119)
- Category: Utilities, Productivity
- Price: Free
- Age rating: 4+
- Requires: iOS 13.0 · 29 MB
- Languages: American English
- Released: 2026-07-11
- Data updated: 2026-08-08
- User reviews in markdown: https://appshunter.io/ios/app/framing-calc-rafter-and-stairs/id6786981827/reviews.md

## What is Framing Calc?

Framing Calc is a construction calculator built for carpenters, framers, and builders.

Rafters, hips and jacks, stairs, stud counts, concrete, blocks, roof area, and board feet - in feet, inches, and fractions, the way your tape reads. One-time purchase for Pro. No ads. No subscription.

- Common rafters: length, plumb cut, bird's mouth from pitch
- Hip/valley and jack rafters
- Stair stringers: rise, run, and step layout
- Stud counts at 16" or 24" o.c.
- Concrete volume, block counts, roof area, board feet
- Triangle / pitch solver
- Fraction-first input and results to 1/16"

Built to replace subscription construction calculators with honest one-time pricing.


## Version history (last 4 releases)

### 1.2.1 — 2026-08-03

Stability and reliability improvements.

### 1.1.1 — 2026-07-26

Stability improvements.

### 1.1 — 2026-07-11

Bug fixes and small improvements.

### 1.0 — 2026-07-09

No release notes.

## More apps by Gun woo Kim

- [picswap - picture swap](https://appshunter.io/ios/app/picswap-picture-swap/id6456039579)
- [mubo - dance formation editor](https://appshunter.io/ios/app/mubo-dance-formation-editor/id6753949227)
- [LinePrompter](https://appshunter.io/ios/app/lineprompter/id6784582453)
- [Conduit Bender: Bend Calc](https://appshunter.io/ios/app/conduit-bender-bend-calc/id6786548483)
- [Tape Calc: Feet Inch Fraction](https://appshunter.io/ios/app/tape-calc-feet-inch-fraction/id6786612707)
- [Pipe Calc: Pipefitter Offsets](https://appshunter.io/ios/app/pipe-calc-pipefitter-offsets/id6786981763)

All apps by Gun woo Kim: https://appshunter.io/developer/1700263119

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-08.*