Replace your $100+ hardware calculator with a smarter one. Construction Expert A1 Pro puts 150+ professional construction calculators in your pocket — feet-inch-fraction math, roofing, rafters, stairs, framing, concrete, material take-offs and more. Works fully offline.
Built for general contractors, framers, carpenters, builders, estimators, electricians, plumbers, HVAC pros and serious DIY builders.
WHY CONTRACTORS SWITCH - Enter 12' 7-3/16" the way you read it on the tape — no decimal conversion - Live drawings highlight each dimension as you enter it, so you know what every number means - One consistent keypad across every calculator, with a Next key that guides you through each form - Save calculations by project, attach photos, export branded PDF reports for your bid - No signal needed — works on the roof, in the basement or at the back of the lot
PROFESSIONAL CONSTRUCTION CALCULATOR - Full feet, inches & fraction math, 1/16 to 1/64 with automatic simplification - Feet, inches, yards, meters, centimeters & millimeters - Percentage, square, cube, square root & reciprocal - Degrees-minutes-seconds and trigonometry (sin, cos, tan) - Expression mode with 12 construction formula templates - Running tape with save, share & print - 3 memory registers plus cumulative memory with count & average
ROOFING & RAFTER CALCULATORS - Pitch, rise, run & diagonal — solve right triangles instantly - Common rafter length with plumb and level cut angles - Hip, valley & jack rafters with cheek cuts and on-center increments - Irregular and dual-pitch roofs - Rake wall stud lengths, ascending or descending - Roof area, squares, bundles & 4x8 sheet count - Interactive rafter diagrams
STAIR & STRINGER CALCULATOR - Total rise to risers, treads & total run - Riser adjustment - Stringer length and angle, open or closed stringers - Interactive stair diagram with labeled dimensions
PROJECTS, NOTES & EXPORT - Organize calculations by project and folder, with rich-text notes and photos - Favorites and searchable history - Professional PDF reports with your company branding - 7 PDF generators: rafters, stairs, fences, balusters, miters, materials & estimates - CSV, PNG & plain-text export
MADE TO FIT YOUR WORK - Imperial or metric default units; fraction resolution from 1/2 to 1/64 - Dark, light or system theme; home screen widgets; haptic feedback - English, Spanish, French, German & Arabic
PRICING Choose a monthly or yearly subscription, or a one-time Lifetime purchase with no recurring charges.
Payment is charged to your Apple ID at confirmation of purchase. Subscriptions renew automatically unless cancelled at least 24 hours before the end of the current period. Manage or cancel in Settings > Apple ID > Subscriptions.
Privacy Policy: https://www.binaryandbricks.com/app/privacypolicy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Construction Expert A1 PRO 1.1.1 Update
2026-09-10
ONE KEYPAD, EVERYWHERE
Every calculator input now opens the same construction keypad. Feet, inches, yards, metres and fractions are always a tap away, and the iPhone number pad no longer turns up halfway through a takeoff.
GUIDED ENTRY
• A new Next key saves the value and moves to the next field without closing the keypad. On the last field it becomes Calculate. • The field you're entering is outlined and scrolled into view, so you always know where you are in a form. • Fields that take words keep the normal keyboard, now with Done and Next above it.
LIVE DIAGRAMS
On Stairs, Rafters, Fence, Baluster and Right Angle, the dimension you're entering is highlighted on the drawing and redrawn as you type — so you can see what the number means before you commit it. Where a drawing has no line for a field, it stays unmarked rather than pointing at the wrong one.
On Stairs you can also tap a dimension on the drawing to jump straight to the field it comes from.
FIXES
• A fraction typed straight after a metric unit (for example m, 3, /, 4) showed the value but saved zero. It now saves what you entered. • Diagrams could draw incorrectly at small sizes. • On roof calculators, the dimension you were editing stayed unhighlighted when it fell outside code limits — the one you were most likely adjusting.
AppPure.com and the download link of this app are 100% safe. The download link of this app will be redirected to the official App Store site, thus the app is original and has not been modified in any way.
Every calculator input now opens the same construction keypad. Feet, inches, yards, metres and fractions are always a tap away, and the iPhone number pad no longer turns up halfway through a takeoff.
GUIDED ENTRY
• A new Next key saves the value and moves to the next field without closing the keypad. On the last field it becomes Calculate. • The field you're entering is outlined and scrolled into view, so you always know where you are in a form. • Fields that take words keep the normal keyboard, now with Done and Next above it.
LIVE DIAGRAMS
On Stairs, Rafters, Fence, Baluster and Right Angle, the dimension you're entering is highlighted on the drawing and redrawn as you type — so you can see what the number means before you commit it. Where a drawing has no line for a field, it stays unmarked rather than pointing at the wrong one.
On Stairs you can also tap a dimension on the drawing to jump straight to the field it comes from.
FIXES
• A fraction typed straight after a metric unit (for example m, 3, /, 4) showed the value but saved zero. It now saves what you entered. • Diagrams could draw incorrectly at small sizes. • On roof calculators, the dimension you were editing stayed unhighlighted when it fell outside code limits — the one you were most likely adjusting.
1.1.0
2026-08-18
The construction calculator your contractor doesn't want you to know about.
• Calculate roof pitch, rafters, hip & valley in seconds • Feet-inches-fractions math • Stair layout from a single measurement • Concrete, drywall, studs, blocks — instant material estimates • Built-in unit conversions: metric, imperial, board feet, acres • Compound miter angles for perfect crown molding cuts • Circle, arc & polygon calculations for curved builds • 3 memory registers + running total with average & count • Works offline — no internet needed on the job site
1.0.9
2026-08-02
The construction calculator your contractor doesn't want you to know about.
• Calculate roof pitch, rafters, hip & valley in seconds • Feet-inches-fractions math • Stair layout from a single measurement • Concrete, drywall, studs, blocks — instant material estimates • Built-in unit conversions: metric, imperial, board feet, acres • Compound miter angles for perfect crown molding cuts • Circle, arc & polygon calculations for curved builds • 3 memory registers + running total with average & count • Works offline — no internet needed on the job site
1.0.7
2026-07-20
The construction calculator your contractor doesn't want you to know about.
• Calculate roof pitch, rafters, hip & valley in seconds • Feet-inches-fractions math • Stair layout from a single measurement • Concrete, drywall, studs, blocks — instant material estimates • Built-in unit conversions: metric, imperial, board feet, acres • Compound miter angles for perfect crown molding cuts • Circle, arc & polygon calculations for curved builds • 3 memory registers + running total with average & count • Works offline — no internet needed on the job site
1.0.6
2026-04-27
The construction calculator your contractor doesn't want you to know about.
• Calculate roof pitch, rafters, hip & valley in seconds • Feet-inches-fractions math • Stair layout from a single measurement • Concrete, drywall, studs, blocks — instant material estimates • Built-in unit conversions: metric, imperial, board feet, acres • Compound miter angles for perfect crown molding cuts • Circle, arc & polygon calculations for curved builds • 3 memory registers + running total with average & count • Works offline — no internet needed on the job site
1.0.4
2026-03-25
The construction calculator your contractor doesn't want you to know about.
• Calculate roof pitch, rafters, hip & valley in seconds • Feet-inches-fractions math • Stair layout from a single measurement • Concrete, drywall, studs, blocks — instant material estimates • Built-in unit conversions: metric, imperial, board feet, acres • Compound miter angles for perfect crown molding cuts • Circle, arc & polygon calculations for curved builds • 3 memory registers + running total with average & count • Works offline — no internet needed on the job site
1.0.1
2026-03-11
The construction calculator your contractor doesn't want you to know about.
• Calculate roof pitch, rafters, hip & valley in seconds • Feet-inches-fractions math • Stair layout from a single measurement • Concrete, drywall, studs, blocks — instant material estimates • Built-in unit conversions: metric, imperial, board feet, acres • Compound miter angles for perfect crown molding cuts • Circle, arc & polygon calculations for curved builds • 3 memory registers + running total with average & count • Works offline — no internet needed on the job site