Save time and reduce costly errors on all your jobs with the award-winning and industry-leading Construction Master® Pro feet-inch-fraction builder's calculator! For over 30 years the Calculated Industries Construction Master handheld calculator has been the trusted go-to tool by top carpenters and framers all across North America and beyond. As an app for your phone or tablet it is ideal for busy Architects, Builders, Contractors, Designers, Engineers, Framers/Carpenters and Tradesmen of every specialty -- Anyone who works with dimensions who is interested in improving speed, accuracy and productivity. You’ll actually get two apps in one, since the Construction Master Pro for iPhone has all the functionality of the Construction Master Pro and the Construction Master Pro Trig -– and includes a full User’s Guide built in, as well as the ability to press and hold a key for specific help! Built with the same core engine that powers the industry-standard advanced construction-math handheld calculators from Calculated Industries. WHY IT'S A MUST-HAVE TOOL • Powerful built-in solutions make it ideal for completing layouts, plans, bids and estimates • Work in and convert between all building dimensional formats: feet-inch-fractions, inch fraction, yards, decimal feet (10ths, 100ths), decimal inches and metric (m, cm, mm) • Built-in right angle functions simplify square-ups, rafters, slopes and more • Full trigonometric function: sine, cosine, tangent, arcsine, arccosine and arctangent • And so much more. APP-ENHANCED FEATURES: • Entry Editing Backspace Key – with a swipe of a finger (left - to - right) • Context-sensitive Help -- just press and hold any function key for Help text, diagrams, videos • Ability to Save or Email calculations and outputs (e.g., cut-lists) to File or others on your crew BUILT-IN SOLUTIONS: Dimensional Math and Conversions • Feet-Inch-Fraction, Inch Fraction, Yards • Decimal Feet (10ths, 100ths), Decimal Inches • Preset Fractions (1/2" through 1/64") • D:M:S, Decimal Degree Entry and Conversions • Full Metric Function (m, cm, mm) Right Angle Solutions • Complete Right Angle/Rafter Calculations • Pitch Key (Slope and Grade) • Rise, Run, Diagonal/Common Rafters • Hip/Valley Key • Jack Rafters Key • Irregular Hip/Valley and Jacks • Rafter Cutting Angles (Plumb, Cheek and Level Cuts) • Stair Layout Key • Stair (Advanced – Riser Limit, Stairwell Opening, Headroom, Floor Thickness) • Diagonal Key • Expanded Rake-Wall • Arched Rake-Wall Area and Volume Solutions • Square and Cubic • Roof – Bundles, Squares, 4x8 Sheets, Pitch, Plan Area • Drywall, Siding and Paneling 4x8, 4x9 and 4x12 • Column/Cone Area and Volume • Basic Circular Calculations • Advanced Circular Calculations • Weight per Volume Conversions • Length, Width and Height Keys • Blocks, Footings Special Functions • Trigonometric Function Keys: Sine, Cosine, Tangent, Arcsine, Arccosine, Arctangent • Board Feet • Studs: Find number On-center • User-Definable Preferences • Cost per Unit (total costs based on unit price) • Equal-Sided Polygon • Compound Miters • Crown Angle • Advanced Paperless Tape for all functions • 4 Memories And while perhaps obvious, if you change from an iOS device to a non-iOS device, you WILL need to buy a new license as they are incompatible. TRADEMARKS: Construction Master® is a registered trademark of Calculated Industries, Inc.