Comparison

Calculator + vs Construction Master Pro Calc

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Calculator +

This app offers a free basic and scientific calculator with an intuitive interface. It supports fractions, percentages, and advanced editing. Optional upgrades provide specialized calculators for fractions with units, polynomial and linear equation solving, graphing, and geometric shapes.

Highlights
  • Free basic and scientific calculator
  • Intuitive interface with equation and result display
  • Fraction and percent support
  • Advanced editing capabilities
  • Polynomial and linear equation solver
  • Graphing calculator
  • Unit conversion and geometric calculators
Features
Read full description

Award winning calculator app for iPad and iPhone. Designed with simplicity, usability and beauty in mind! FEATURES: - Free basic calculator - Free scientific calculator - Elegant & Intuitive interface - Advanced editing by easily going back and forth - Displays both the equation & the result at the same time - Supports Fraction & Percent - Supports many scientific functions If you are looking for more advanced features you can upgrade to one or more of the following: - Fraction Calculator with feet, inches & cm support! - Solving for x with a polynomial Calculator for solving quadratic & cubic equations 2x³ - 4x² - 22x + 24 = 0 - Linear Equations Solver for solving system of linear equations 2x – y = 9 3x + 4y = –14 - Graphing Calculator to find the local min, max & intersection points y = 2x³ – 4x (x² + y²)³ = -27y²x² - Triangle Calculator - Cone Calculator - Arc Calculator - Circle Calculator - Base Converter ( HEX OCT BIN DEC ) - Multiple themes Enjoy the FREE Scientific calculator on your iPhone & iPad. If you like it, support us by upgrading or giving us a positive review. Thanks :) Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Construction Master Pro Calc

This app is a powerful construction calculator designed for professionals working with dimensions. It offers a wide range of solutions for dimensional math, right angle calculations, area and volume, and special functions, helping to improve speed and accuracy in layouts, bids, and estimates.

Highlights
  • Dimensional math and conversions
  • Right angle and rafter calculations
  • Area and volume solutions
  • Full trigonometric functions
  • Built-in user's guide and help
  • Save and share calculations
  • Project notes and attachments
Features
Read full description

FREE Try Before You Buy 14 Day Trial; your App Store account is not charged by Apple during the free trial. Rated 4.8 stars with over 1.12M downloads. The trusted construction calculator used by professionals across the US and the world. The go-to feet-inch-fraction calculator for framers, contractors, and builders. Includes Construction Master Pro and Construction Master Pro Trig in one app, with the CMPro Training Guide built in. Built with the same core engine that powers the industry-standard advanced construction-math calculators from Calculated Industries. Award-winning tools trusted by the industry for 40 years. BUILT FOR THE JOBSITE • Framers and carpenters: rafter cuts, stair layouts, lumber quantities, and framing calculations on the job • Builders and general contractors: estimates, material takeoffs, and building layouts • Concrete and masonry: footing volume, block counts, and unit conversions • Roofing contractors: bundles, squares, pitch, and slope in seconds WHY PROFESSIONALS CHOOSE CONSTRUCTION MASTER® PRO • Powerful built-in calculations make CMPro ideal for completing layouts, plans, bids, and estimates • Work in and convert between all common building dimensional formats US & Metric • Built-in right angle functions simplify square-ups, rafters, slopes, and more • Handles framing, roofing, concrete, lumber, and stair calculations in one app • Full trigonometric functions for advanced construction math BUILT-IN SOLUTIONS • Dimensional Math and Conversions • Feet-Inch-Fraction, Inch Fraction, Yards • Decimal Feet and Inches (10ths, 100ths) • 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 Rafter Keys • Regular and Irregular Hip/Valley & Jack Rafter Keys • Rafter Cutting Angles (Plumb, Cheek, and Level Cuts) • Stair Layouts (including – Riser Limit, Stairwell Opening, Headroom, Floor Thickness) • Rake-Wall (including Arched) 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 & 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 APP-ENHANCED FEATURES • Ask CMPro – exact steps for any calculation. AI built on CMPro’s 40 years of proven math • CMPro Toolbelt -- quick access to every tool, customizable for your workflow • Fast Fractions Mode -- dedicated fraction keys for faster, more precise entry • Materials Mode -- streamlined estimating for drywall, roofing, lumber, and more • Project Notes -- create text or voice-to-text notes, set up folders by project or client, add attachments, and share with your crew • EZ Calcs – 100+ forms-based calculators with illustrations for framing, concrete, roofing quantities, and much more. • Searchable Help and how-to videos • Context-sensitive Help -- press and hold any function key for Help text, diagrams, and videos • Save and share calculations and outputs (e.g., cut lists) with others on your crew • Bosch GLM integration -- send measured values into live calculations or Notes SUBSCRIPTION INFORMATION Subscription automatically renews unless canceled at least 24 hours before the end of the current period. Manage or cancel in Apple account Settings > Account (Apple ID) > Subscriptions. TRADEMARKS Construction Master® and Calculated Industries® are registered trademarks of Calculated Industries, Inc. Copyright 2026

Screenshots

Calculator +1 screens
Construction Master Pro Calc4 screens

Verdict

The call

The clearest difference is ads: Construction Master Pro Calc at none against Calculator +'s shown. Construction Master Pro Calc also leads on rating (4.8 vs 4.6) and chart position (#43 vs unranked). Calculator +'s advantage is review sentiment (85% vs 60%) and update cadence (every 4 days vs every 3 weeks). On price, in-app purchases, monetization model and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Calculator + sells 12 in-app purchases, starting at $4.99 per month and Construction Master Pro Calc sells 12 in-app purchases, starting at $3.69 per month. Whichever you choose, the download price is not the number that matters.

ReceptionRating · Positive reviews · Number of ratings

Construction Master Pro Calc holds the better App Store score, 4.8 against 4.6. Both are backed by a comparable volume of ratings — 10K and 40K respectively. Written reviews complicate that: 85% of Calculator +'s written reviews are positive against 60% of Construction Master Pro Calc's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Calculator + ships an update every 4 days, Construction Master Pro Calc every 3 weeks. The most recent releases landed on September 24, 2026 and September 25, 2026 respectively.

Scorecard6 real differences · 5 level
Calculator + versus Construction Master Pro Calc: the parameters behind the verdict, then further details
ParameterCalculator +Construction Master Pro Calc
PriceFreeFree
Rating4.6 (10K ratings)4.8 (40K ratings) — better
Positive reviews84.9% of reviews — better60.1% of reviews
Number of ratings10K40K — better
Update frequencyEvery 4 days — betterEvery 3 weeks
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
Best chart rank—#43 — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS16.415.0 — better
Further details — not scored
Size48 MB111 MB
Age rating4+12+
DeveloperxNeat.comCalculated Industries

Customer experience

Calculator +

All ratings10,020 ratings
Positive91.7%
Neutral2.9%
Negative5.4%
Written reviews940 reviews
Positive84.9%
Neutral4.0%
Negative11.1%

Construction Master Pro Calc

All ratings39,604 ratings
Positive96.4%
Neutral1.2%
Negative2.3%
Written reviews321 reviews
Positive60.1%
Neutral5.3%
Negative34.6%

User reviews

Calculator +

From 10K App Store ratings

What we love

  • 👍 Great features and easy to use
  • 👍 Efficient and quick
  • 👍 Versatile, functional calculator
  • 👍 Fantastic, easy to use app
  • 👍 Awesome calculator app

Room to improve

  • 🐛 New updated layout is awful
  • 🐛 App is now terrible
  • 🔒 Paying customer screwed over by update
  • 🔒 Now timed trial, no free w/ads version
  • 🔒 Not honest

Construction Master Pro Calc

From 40K App Store ratings

What we love

  • 🚀 Convenient and always available
  • ⚙️ Comprehensive construction calculations
  • 💪 Industry-standard tool
  • 🔍 Accurate and reliable
  • 📱 Integrates well with mobile devices

Room to improve

  • 💰 Subscription model too expensive
  • 🔒 Locks data behind subscription
  • 🔄 Forced to re-purchase after device changes
  • 🔍 Lacks full metric support
  • 🔧 Occasional UI/UX issues

Bugs and requests

Calculator +

Reported bugs

5 issues
  • Fraction calculator has TWO subtraction buttons and NO division button
  • Decimals seem to be changed to fraction with no apparent way of changing it back
  • Functionality is dropped by forcing you to the main menu every time you open it
  • Currency converter broken
  • Login screen freezes

Requested features

5 requests
  • Add mod function
  • Add commas
  • Add 1/x function
  • Support for Retina Display
  • Add number 4 with two lines

Construction Master Pro Calc

Reported bugs

3 issues
  • Crashes or freezes on certain devices
  • Calculation errors in some scenarios
  • Inconsistent behavior after updates

Requested features

5 requests
  • Add metric unit support
  • Offer one-time purchase option
  • Improve backup and data transfer
  • Add more customization options
  • Enhance overall user experience

In-app purchases

12 purchases

Calculator +

Subscriptions2
  • Scientific Calculator3 Days trial$4.991 Month
  • Calculator7 Days trial$39.991 Year
One-time10
  • Linear Calculator$2.99
  • Factoring Calculator$2.99
  • Handwriting Calculator$2.99
Show 7 more
  • Currency Converter$2.99
  • Themes Pack$2.99
  • Graphing Calculator$3.99
  • Fraction Calculator$3.99
  • Scientific Calculator$4.99
  • Calculator Plus$4.99
  • Calculator$16.99
12 purchases

Construction Master Pro Calc

Subscriptions12
  • 1 Month Full Access7 Days trial2 variants$3.691 Month
  • 1 Month Full Access14 Days trial4 variants$4.991 Month
  • 1 Month Full Access7 Days trial$4.991 Month
Show 9 more
  • 1 Month Full Access1 Month trial$4.991 Month
  • CMPro Full Access7 Days trial$9.991 Year
  • 6 Months Full Access7 Days trial$19.996 Months
  • 1 Year Full Access7 Days trial$19.991 Year
  • 1 Year Full Access7 Days trial2 variants$29.991 Year
  • 1 Year Full Access14 Days trial4 variants$39.991 Year
  • 1 Year Full Access7 Days trial$39.991 Year
  • 1 Year Full Access1 Month trial$39.991 Year
  • 1 Year Full Access3 Months trial$39.991 Year

Questions

Is Calculator + free?
Calculator + is free to download, with in-app purchases available.
Is Construction Master Pro Calc free?
Construction Master Pro Calc is free to download, with in-app purchases available.
Which has better reviews, Calculator + or Construction Master Pro Calc?
Construction Master Pro Calc is rated higher. Calculator + averages 4.6 out of 5 from 10K ratings, while Construction Master Pro Calc averages 4.8 from 40K ratings.
Do Calculator + or Construction Master Pro Calc have ads?
Calculator + shows ads; Construction Master Pro Calc does not.
Which is updated more often, Calculator + or Construction Master Pro Calc?
Calculator + ships an update every 4 days, and Construction Master Pro Calc every 3 weeks. Most recently, Calculator + was updated on September 24, 2026 and Construction Master Pro Calc on September 25, 2026.

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