inchCALC+ vs Construction Master Pro Calc
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
inchCALC+
This app is a professional-level calculator designed for working with feet, inches, and fractions, commonly used in construction and DIY projects. It simplifies complex calculations like addition, subtraction, multiplication, and division of these dimensions, transforming your device into a powerful measurement tool.
- Feet, inch, fraction calculations
- Conversions to various units
- Triangle function for rise, run, diagonal, pitch
- Dual modes for simple and complex problems
- Selective keyboard orientation
- Built-in math functions (sqrt, square, pi, percent)
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PRO LEVEL [FOOT • INCH • FRACTION] CALCULATOR MACWORLD **** "inchCALC+'s ease of use coupled with its advanced features make this an uncommonly good addition to a crowded genre." 3/9/09 inchCALC+ is a State-of-the-Art Construction Calculator / Conversion Calculator for people who work with the FEET• INCH• FRACTION dimensions used on common rulers and tape measures. These dimensions are shear drudgery when you have to manually add or subtract them --- let alone multiply, divide or convert to other measurement units. If you are a builder, contractor, sub-contractor, architect, engineer, artist, designer, student, homemaker or DIYer, you know the importance of working with accurate dimensions. inchCALC+ transforms your iPhone / iPod Touch into a FT• IN• FRACTION construction calculator that inputs and outputs dimensions exactly as they appear on a tape measure. Dedicated and held construction calculators with similar functions are very expensive. With inchCALC+ you can inexpensively perform the functions of those calculators on your iPhone / iPod Touch. Easy conversions to other measurement units: -FT• IN • FRACTION -IN • FRACTION -decimal inches -decimal feet -millimeters -centimeters -meters -kilometers -acres -yards -miles Built-in TRIANGLE FUNCTION -- Enter any two & inchCALC+ automatically solves for the other two: -rise -run -diagonal -pitch Selective Keyboard Orientation for Left Handed or Right Handed users DUAL MODES: -inchCALC for quickly working with simple measurements -inchCALC+™ for working with more complex problem solving -Built-in Functions: √2, X2, π, %, +/- See further details & User Guide on our website below:
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.
- 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
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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
Verdict
The clearest difference is price: Construction Master Pro Calc at Free against inchCALC+'s $4.99. Construction Master Pro Calc also leads on rating (4.8 vs 3.7) and ratings volume (40K vs 17). inchCALC+'s advantage is in-app purchases (none vs 20) and review sentiment (74% vs 60%). On ads 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
Construction Master Pro Calc is free to download; inchCALC+ costs $4.99 up front. Construction Master Pro Calc sells 12 in-app purchases, starting at $3.69 per month. inchCALC+ asks for nothing beyond the download.
Construction Master Pro Calc holds the better App Store score, 4.8 against 3.7. That said, the two scores are not equally well evidenced: Construction Master Pro Calc has 40K ratings behind it against 17, so its average is the more settled of the two. Written reviews complicate that: 74% of inchCALC+'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.
inchCALC+ ships an update every 2 months, Construction Master Pro Calc every 3 weeks. The most recent releases landed on October 8, 2026 and October 15, 2026 respectively.
| Parameter | inchCALC+ | Construction Master Pro Calc |
|---|---|---|
| Price | $4.99 | Free — better |
| Rating | 3.7 (17 ratings) | 4.8 (40K ratings) — better |
| Positive reviews | 74.4% of reviews — better | 59.9% of reviews |
| Number of ratings | 17 | 40K — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Free with in-app purchases — better |
| Best chart rank | — | #46 — better |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 15.0 |
| Further details — not scored | ||
| Size | 19 MB | 111 MB |
| Age rating | 4+ | 12+ |
| Developer | River Studio | Calculated Industries |
Customer experience
inchCALC+
Construction Master Pro Calc
User reviews
inchCALC+
From 17 App Store ratingsWhat we love
- 👍 Excellent for feet and inches calculations
- 👍 Great for metric/imperial conversion
- 👍 Practical and easy to use
- 👍 Replaces expensive physical calculators
- 👍 Smooth calculations and easy unit conversion
Room to improve
- 🐛 Crashes on newer iOS versions
- 🐛 Not worth the money compared to free apps
- 🐛 Missing simple but crucial features
- 🐛 Outdated UI, not optimized for modern screens
- 🐛 Buttons too small on landscape screen
Construction Master Pro Calc
From 40K App Store ratingsWhat 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
inchCALC+
Reported bugs
20 issues- Crashes on iOS 14.2
- Does not recognize numbers 1, 2, 3 in landscape on mini2 retina
- App freezes in landscape mode
- Latest update does not download on iPhone 3GS
- Not updated to fit any screen since iPhone 4
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- Landscape view never starts up right on iPad
- Blank borders on iPhone 6
- Freezes in landscape mode
- Crashing on 4.0
- Right angle solver not great
- Doesn't save in memory after closing
- Always opens with a random number showing
- Major bug: calc fix and stay after restarting
- Rounding calculations with the 'diag' function
- Pitch is read only in degrees
- Cannot solve for RISE when RUN and PITCH are known
- Area formulas are cut off at the bottom
- Key lag
- Key sound triggered by lifting finger, not initial touch
- Slow flipping to advanced version with tilting
Requested features
28 requests- Add a tape-like function
- Improve vertical calculator conversion settings
- Add a history view option
- Allow storing and further calculation with results
- Add a backspace key
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- Update UI for modern iOS versions
- Optimize for larger screens (iPhone 6/6 Plus, iPad)
- Add a desktop version
- Add a CE (cancel entry) button in portrait mode
- Allow pitch entry in inches/slope ratios, not just degrees
- Add stair and roof functions
- Add copy/paste function in display
- Add constant storage or memory
- Add ability to convert decimals to fractions and vice versa
- Add clear entry for vertical calculator
- Make buttons larger in horizontal mode
- Add examples to website for complex calculations
- Allow users to submit tips and tricks
- Option to turn off key clicks or use standard iPhone click sound
- Display remainder when dividing fractions or an 'R' indicator
- Add a graph for pitch, rise, and run
- Ability to convert from foot/inches to decimal without performing a calculation
- Attach formulas to buttons with labels
- Add more complicated formulas
- Fix slow rotation between orientations
- Fix scrolling to the bottom of information screens
- Add area of circles or volumes of cylinders
- Add intuitive interface for rafter diagonals
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
inchCALC+
No in-app purchases
Construction Master Pro Calc
- 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
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- 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 inchCALC+ free?
Is Construction Master Pro Calc free?
Which has better reviews, inchCALC+ or Construction Master Pro Calc?
Do inchCALC+ or Construction Master Pro Calc have ads?
Which is updated more often, inchCALC+ or Construction Master Pro Calc?
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