The Construction Master 5 calculator for your Android smartphone is built with the same features and functions, and the same core engine that powers the industry-standard advanced construction-math calculators from Calculated Industries. And while perhaps obvious, if you change from an Android device to an iPhone or iPad, you WILL need to buy a new license as they are incompatible.No learning curve -- just one powerful, easy-to-use calculator app, for Carpenters, Builders & More.Save time with solutions for Contractors, Builders, Carpenters, Architects, Engineers, Tradespersons and Advanced Do-It-Yourselfers⢠You get ALL of the functionality of the handheld Construction Master 5 calculator.⢠Calculate tough construction-math problems and reduce errors on the jobsite or in the office.⢠Reduce costly errors and save time and money. It will help you and your crew on every phase of your projects â estimating, bidding and building.FEATURES:⢠Created by Calculated Industries, the originator of the award-winning Construction Master calculators⢠All the functionality and solutions of the handheld Construction Master 5 and optimized for the Android smartphone user⢠Built-in help â just press and hold the desired key for full, clear definitions, explanations and examples of keystrokes⢠Powerful built-in solutions make it ideal to calculate 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⢠Calculate Areas and VolumesDimensional Math and Conversions⢠Feet-Inch-Fraction, Inch Fraction, Yards ⢠Decimal Feet (10ths, 100ths), Decimal Inches ⢠Preset Fraction Conversions (1/2" through 1/64") ⢠Full Metric Conversions Function (m, cm, mm) Right Angle Solutions⢠Complete Right Angle/Rafter Calculations ⢠Pitch Key (Slope and Grade) ⢠Calculate Rise, Run, Diagonal/Common Rafters ⢠Hip/Valley Key ⢠Jack Rafters Key ⢠Irregular Hip/Valley Rafters and Jack Rafters⢠Stair Layout Key for easy stair calculations⢠Diagonal Key ⢠Expanded Rake-Wall Area and Volume Solutions⢠Square and Cubic ⢠Basic Circular Calculations ⢠Weight per Volume Conversions Special Functions⢠Calculate Board Feet ⢠User-Definable Preferences ⢠Haptic Feedback (optional)⢠Entry Editing Backspace Key â with a swipe of a finger⢠Cost per Unit (Total costs based on unit price) ⢠Advanced Paperless Tape ⢠Memory functionIdeal for Contractors, Builders, Carpenters, Architects, Engineers, Tradespersons and Advanced Do-It-YourselfersLegacy mode - backspace key is back! Go to the CM5s preference settings to turn on legacy mode which will bring back the backspace key.