# Story Pole: Feet Inch Stairs — Fraction Calculator & Rafters

> Fraction Calculator & Rafters (iPhone/iPad app by 岚烜 吴.)

- Source: https://appshunter.io/ios/app/story-pole-feet-inch-stairs/id6795585219 (this page in markdown: same URL + `.md`)
- Developer: [岚烜 吴](https://appshunter.io/developer/6788589687)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 3 MB
- Languages: American English, Dutch, French (France), German (Germany), Italian, Japanese, Korean, Polish, Brazilian Portuguese, Russian and 4 more
- Released: 2026-08-12
- Data updated: 2026-09-05
- User reviews in markdown: https://appshunter.io/ios/app/story-pole-feet-inch-stairs/id6795585219/reviews.md

## What is Story Pole?

Your phone's calculator can't do 5' 7-3/8" + 2' 11-5/16". This one can, and it stays exact the whole way through, so four operations later you're not off by a sixteenth.

WHAT IT DOES
• Tape measure. Add, subtract, multiply, divide in feet, inches and fractions. Metric underneath if you want it.
• Stairs. Riser height, treads, stringer, cut list.
• Roof. Pitch as rise over run, common rafters, hips and valleys.
• Squaring. What the diagonal should be, and how far off yours is.
• Concrete. Cubic yards to order, or the bag count at the published yield.
• Materials. Tile, paint, lumber, on real dressed sizes. A 2x4 is 1-1/2" by 3-1/2".

ABOUT THAT CUT LIST
Nine foot one over fifteen risers works out to 7 and 4/15 of an inch. There's no such mark on a tape. Cut all fifteen at 7-1/4" and your top step comes up a quarter inch short, and people feel that with their feet. So the app gives you eleven at 7-1/4" and four at 7-5/16". Add them up and you get nine foot one exactly.

That's the same reason every answer in here tells you whether it's exact or rounded.

CODE CHECK
Stairs are checked against IRC 2021 R311.7.5, named on screen. Over the limit and it says by how much, then offers the riser count that fixes it. It's the model residential code. Your jurisdiction may have amended it, and the app says that too, instead of telling you you're fine.

WHERE THE NUMBERS COME FROM
Lumber from PS 20-20. Bag yields off Quikrete and Sakrete's own data sheets. Paint coverage from Sherwin-Williams. Listed in Settings with the date each one was checked, so go look.

SENDING IT ON
Save a calculation, give it a name, send the day's numbers as plain text to whoever does the ordering.

ONE PAYMENT, NOT A SUBSCRIPTION
The feet-inch calculator and the squaring check are free and stay free. Run something you already know the answer to before you spend anything.

Works with no signal. No account, and your measurements never leave the phone. It does send an anonymous count of how often the app gets opened and used. That count says nothing about what you measured, and Settings has a switch to stop it.

## Pricing and in-app purchases

Base price: Free.

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Every Calculator | $5.99 | one-time |



## Version history (last 2 releases)

### 1.1 — 2026-08-28

Settings has two new rows. One rates the app. The other writes to me, with the version and the phone already filled in so you do not have to answer any of that later.

Two colours were too pale to read outdoors, which on a job site is the same as not being there. The green on "Meets IRC 2021 R311.7.5" and on "Saved to Log" is darker now. The ft, in and fraction keys have dark text on the amber instead of white, and those three keys are the reason this is not the calculator that came with the phone.

There is also a switch for anonymous counts, on by default: how often the app opens, how many calculations get run. What you measured never leaves the phone.

Underneath all that, the arithmetic picked up thirteen tests for the inputs nobody means to type. A zero rise. A negative one. A riser count of a hundred. The guards were always there; now something goes red if anyone takes one out.

### 1.0 — 2026-08-12

No release notes.

## More apps by 岚烜 吴

- [CoverForge: Book Cover Maker](https://appshunter.io/ios/app/coverforge-book-cover-maker/id6790119719)
- [OffLingo: Offline Translator](https://appshunter.io/ios/app/offlingo-offline-translator/id6790425607)
- [Pip: Kids Preschool Storybook](https://appshunter.io/ios/app/pip-kids-preschool-storybook/id6792321907)
- [Passport Photo & ID: IDReady](https://appshunter.io/ios/app/passport-photo-and-id-idready/id6794147039)
- [Meowtch: Cat Cafe Tile Match](https://appshunter.io/ios/app/meowtch-cat-cafe-tile-match/id6794862151)

All apps by 岚烜 吴: https://appshunter.io/developer/6788589687

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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 2026-09-05.*