Where each app wins
Construction Calculator by KLM Labs (ours)
- Add, subtract, multiply and divide feet, inches and fractions exactly (type 5' 7-3/8"), with %, x², √, π, brackets and memory keys (facts page).
- 11 tools: stairs, roof pitch, hip and valley rafters, jack rafters, rake walls, miters (flat and crown), concrete in cubic yards and bags, board feet, circles and arcs, cost per unit, and a unit converter (facts page).
- In English and Spanish (Mexican Spanish), following your device's language (facts page).
- A Home Screen widget shows your last answer; the medium size adds shortcuts to Stairs, Concrete, Roof pitch and the tool list (facts page).
Construction Master Pro Calc
- Ask CMPro: step-by-step guidance for calculations, powered by AI (App Store).
- Measurements sent straight from a Bosch GLM laser measure (App Store).
- Project notes with voice-to-text, folders and attachments, shared with your crew (App Store).
- An Android version (calculated.com).
Fraction Calculator Plus
Construction Master 5 Calc
- Searchable help, press-and-hold help on each function, and tutorial videos (App Store).
- Calculations and cut lists sent by email (App Store).
- An Android version (calculated.com).
Feet & Inches Tape Calculator
Builder's Helper MAX
What Construction Calculator doesn’t do
Every feature, the calculator included, needs the free trial or a purchase. It has no AR or laser measuring (you type the measurements in), no saved projects or jobs, and only the stair layout exports a PDF. There’s no Android or web version. If you need a laser measure feeding the numbers, project notes for a crew, or an Android phone, the other apps here have those.
Which kind of app fits
- You want to measure with a laser and send it straight to the math: Construction Master Pro works with Bosch GLM laser measures.
- You want projects with notes, documents or photos: Construction Master Pro and Builder’s Helper MAX keep projects.
- You only need fractions, for building or anything else: Fraction Calculator Plus is a general fraction calculator.
- You want exact feet-inch-fraction math and the tools for stairs, roofs, rafters, concrete and board feet in one app, in English or Spanish: that’s what Construction Calculator is for, with a one-time Lifetime purchase as well as a yearly plan.
How we picked these apps
We searched the US App Store for construction calculator, feet inch calculator, fraction calculator construction and construction master on the day we checked, and picked five of the apps with the most ratings shown that do feet, inch and fraction math for building work. Two come from the same developer: Construction Master Pro and Construction Master 5 are sold as separate apps.
| App | Developer | App Store rating as shown on November 7, 2026 | Ratings shown |
|---|---|---|---|
| Construction Master Pro Calc | Calculated Industries, Inc. | 4.8 out of 5 | 41K |
| Fraction Calculator Plus | DigitAlchemy LLC | 4.9 out of 5 | 23K |
| Construction Master 5 Calc | Calculated Industries, Inc. | 4.8 out of 5 | 13K |
| Feet & Inches Tape Calculator | Tue Nguyen Minh | 4.4 out of 5 | 9.3K |
| Builder's Helper MAX | My Pie Interactive | 4.7 out of 5 | 1.8K |
Construction Calculator is not in this table: it is new, with too few ratings to show.
Where each fact comes from
Our app's row comes from its Construction Calculator facts page, checked against the App Store. Each other app's row comes from these pages, read on November 7, 2026:
- Construction Master Pro Calc: App Store page, calculated.com/products/construction-master-pro-app.
- Fraction Calculator Plus: App Store page.
- Construction Master 5 Calc: App Store page, calculated.com/products/construction-master-5-app.
- Feet & Inches Tape Calculator: App Store page.
- Builder's Helper MAX: App Store page.
Apps change their prices and features often. If something here is out of date, email support@klmlabs.app and we'll check it again.