TrueCut: Construction Calc

Pro construction calculator. One-time purchase. No subscription.

See the cut, not just the number. Every rafter, stair, crown, and baluster answer draws a live, dimensioned diagram, and "Explain this cut" walks you through the layout step by step, in the order you'd mark the stock.

Free 14-day full trial, then $24.99 once. Basic feet-inch math and the baluster solver stay free forever. No account, no ads, no analytics.

Built for gloves, thumbs, and full sun: a fraction-native keypad (tap 5, then 1/2, done), big keys with a haptic tick on every press, and a one-tap high-contrast Site Mode for the jobsite.

THE PLEDGE
• One-time purchase. No subscriptions. Ever.
• Free 14-day full trial, disclosed up front. No payment info to start.
• Basic feet-inch math and the equal-spacing baluster solver stay free forever.
• Family Sharing on the Full Unlock. The household owns the tool.

RAFTER STUDIO
• Common, hip, valley (regular and irregular), and jack rafters with a numbered cut list
• Explain this cut: ridge plumb cut, line length, ridge deduction, birdsmouth, tail, and stock length as ordered layout steps
• Pitch gauge: lay the phone on the roof or rafter, hold, zero, and write the pitch into the solver
• Plumb, level, and cheek angles shown as saw-dial settings
• Ridge allowance, overhang, and HAP

STAIR STUDIO
• Riser and tread solver with a scrollable stringer diagram
• Explain this cut: divide the rise, set the gauges, step off the stringer, drop the stringer, check headroom
• Reference checks against your configured IRC, IBC, NBC, NCC, or UK Approved Document K limit presets, never a compliance ruling
• +1 / −1 riser stepper re-solves live so you trade riser height against run
• Headroom and stairwell opening checks; framing-square gauge settings on the cut sheet

DECK & BALUSTER STUDIO
• Equal-spacing baluster solver: count, center-to-center, and the first mark off the post (free forever)
• On-center joist and stud layout at 12, 16, 19.2, 24" or custom
• Full fence takeoffs: post bays, rails, pickets or panels, gates, post-hole concrete, and 3-4-5 square-up

CROWN & MITER STUDIO
• Spring-angle presets (38°, 45°, 52°) plus custom
• Compound miter and bevel for any corner angle, drawn as saw dials
• Nested vs. flat cutting guidance with a diagram

MATERIALS STUDIO
• Concrete volume and bag counts, roofing squares, drywall and siding sheets, paint, flooring, tile, blocks, board feet, studs
• Arc & Circle card: circumference, area, arc length, and arch layout
• Lightweight estimates with waste factor and unit cost that roll up to a total

LASER MEASURE
• Capture a distance from a supported Bosch GLM or Leica DISTO straight into the keypad and tape, over Bluetooth, on device

FULL FEET-INCH-FRACTION MATH
• Add, subtract, multiply, divide, powers, and square roots across mixed units
• Decimal feet, decimal inches, yards, and full metric (m, cm, mm)
• Fraction resolution from 1/2 to 1/64 with smart auto-reduce
• Convert in place, memory slots, square-up with angle entry, and a persistent, labeled tape you can restore and edit

PROJECTS, WIDGETS, AND SIRI
• Save cut sheets, estimates, and tape lines into named projects and share a whole project as one PDF
• Home Screen and Lock Screen widgets show your last result; a Control Center button opens the keypad
• Siri and Shortcuts open any studio by name

SHARE THE CUT
Every studio exports a dimensioned Cut Sheet PDF, with an optional layout-steps page. AirDrop or text it to your crew.

PRIVACY
No analytics, no accounts, no ads. The app makes no network calls of its own. Purchases are handled by Apple. App Privacy label: Data Not Collected.

Reference calculation — verify against local code and field conditions before cutting.