# ShopMath: Project Calculator — Feet-inch fraction, trade math

> Feet-inch fraction, trade math (iPhone/iPad app by Andrew Hazlitt.)

- Source: https://appshunter.io/ios/app/shopmath-project-calculator/id6792112349 (this page in markdown: same URL + `.md`)
- Developer: [Andrew Hazlitt](https://appshunter.io/developer/6787833707)
- Category: Utilities, Productivity
- Price: $6.99
- Age rating: 4+
- Requires: iOS 17.0 · 1 MB
- Languages: American English
- Released: 2026-08-05
- Data updated: 2026-08-21
- User reviews in markdown: https://appshunter.io/ios/app/shopmath-project-calculator/id6792112349/reviews.md

## What is ShopMath?

Buy it once. Own it forever. ShopMath is a fast, beautiful feet-inch-fraction calculator with five essential trade solvers — fully offline, with no ads, no account, and no subscription. Ever.

Most calculators fight you with decimals. ShopMath speaks the language of the shop and the jobsite: feet, inches, and fractions, added and multiplied exactly, then shown to the precision you choose (1/8 down to 1/64). When rounding loses precision, it tells you with a clear "≈" — no silent lies.

WHAT'S INSIDE
• Fraction Calculator — add, subtract, multiply, and divide feet-inch-fractions with a running tape, memory, and instant metric conversion.
• Stairs — risers, riser height, treads, total run, and stringer length, with editable code-reference values for Canada (NBC) and the US (IRC).
• Roof Pitch — convert freely between pitch, angle, and rise/run, and get the common rafter length.
• Board Feet — thickness × width × length, with quantity, optional cost, and cubic-metre output.
• Concrete — slab, footing, and round column volumes with a waste factor and bag counts that always round up.
• Unit Converter — length, area, volume, and weight, imperial to metric, exact.

BUILT RIGHT
• 100% offline. No network calls, anywhere.
• No account, no ads, no subscription, no in-app purchases.
• Privacy: Data Not Collected. ShopMath sends us nothing.
• Dark mode, Dynamic Type, and high-contrast throughout.

Reference values are provided for convenience and are not building-code advice. Verify all results against local codes and manufacturer specifications.


## Version history (last 1 release)

### 1.0 — 2026-08-05

No release notes.

## More apps by Andrew Hazlitt

- [PuckStop: Goalie Stats](https://appshunter.io/ios/app/puckstop-goalie-stats/id6787833705)
- [UpNext Family](https://appshunter.io/ios/app/upnext-family/id6789259922)
- [UnderLimit](https://appshunter.io/ios/app/underlimit/id6791750882)

All apps by Andrew Hazlitt: https://appshunter.io/developer/6787833707

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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 2026-08-21.*