ShopMath: Project Calculator
Feet, inches and fractions
Only for iPhone
$6.99 · Designed for iPhone. Not verified for macOS.
iPhone
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.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Updated App Store subtitle and search keywords. All six tools continue to work fully offline.
The developer, Scott Hazlitt, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Scott Hazlitt
- Size
- 820.2 KB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Scott Hazlitt
