Construction Calculator vs RafterMate

Build faster, measure smarter. Pro² is a complete construction calculator for decking, roofing, concrete, stairs, framing and precise on-site measurements. It’s made for builders, carpenters, contractors and serious DIY who need accurate answers in seconds. DECKING & FLOORING • Area, board runs, spacing and waste allowance • Material takeoff for boards and joists ROOFING (METAL & TILE) • Coverage and sheet/tile counts • Overhangs, pitch, angle and rafter length helpers STAIRS & STRINGERS • Rise/run, slope %, angle (°) and stringer length • Clear breakdowns and step-by-step visuals BALUSTERS, RAILING & EVEN SPACING • Perfect marks from 0 to full length • Spacing tables for clean, consistent layouts CONCRETE, ASPHALT, GRAVEL & SOIL • Volume estimators for slabs, pads, footings and fills • Smart rounding for real-world quantities SLOPE, PITCH & ANGLES • Fast framing helpers for cuts and layout • Metric and imperial support in every tool UNIT CONVERTER • Length, area, volume, density and weight • Built for mixed-unit jobs (mm, ft, inches) QUICK CALCULATOR • Running history with one-tap copy/share MADE FOR THE JOBSITE • Fraction support and practical defaults • Works fully offline—no signal required • Clean visuals that stay readable outdoors WHY PROS USE PRO² • One app instead of juggling multiple separate tools • Accurate results, simple inputs and clear diagrams • New tools and improvements arrive regularly based on user feedback Pro² is built for professional construction, carpentry, decking, roofing and framing work—yet intuitive enough for DIY home projects. Upgrade to unlock additional tools and advanced features when you’re ready to grow your toolkit. SUBSCRIPTION TERMS • Carpenter Pro is an optional auto-renewing subscription with Weekly and Annual plans. • A 3-day free trial is available on the Annual plan. • Payment is charged to your Apple ID and subscriptions renew automatically unless cancelled at least 24 hours before the end of the period. • You can manage or cancel your subscription in your App Store account settings. • Lifetime is a one-time purchase and does not auto-renew. • The localized price is shown in-app before you confirm. Terms of Use (Apple EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://shapkin.dev/apps/carpenter/privacy.html

RafterMate is the construction calculator you buy once — no subscription, no account, no ads. Built for carpenters and framers, it does the feet-inch-fraction math you do all day, then adds the trade tools you actually reach for — each on its own visual screen with a live blueprint diagram, accurate to 1/16". THE CALCULATOR - Feet-inch-fraction, decimal feet, yards and metric - add, subtract, multiply, divide - Paperless tape that remembers every step - Area, volume, square feet and cubic yards THE PRO TOOLS (one-time unlock) - Rafter - run + pitch to rafter length, plumb/seat/birdsmouth cuts, ridge and overhang - Stair - total rise to risers, treads, stringer length and the bottom-riser drop, with live IRC code warnings - On-Center - wall length + 16"/19.2"/24" spacing to stud/joist counts, mark positions and wall-framing material - Roofing - roof area to squares, shingle bundles and sheathing - Area & Volume - slabs, footings and piers to square feet and cubic yards of concrete - Board Feet - thickness x width x length to board feet and cost - Deck - joists, beam, posts, footings and decking, with IRC joist-span checks - Concrete - slab, footing or round column to cubic yards and premix bags - Cut List - your pieces + stock lengths to a waste-minimizing, kerf-aware cut plan - Miter - crown and corner miter + bevel angles WHY RAFTERMATE - Buy once. No subscription. Ever. - Works fully offline - no account, no sign-in - Universal - one purchase covers iPhone and iPad - Validated against pro reference math to 1/16" Pay once, open to the calculator, get to work.