Comparison

Construction Master Pro Calc vs Live Spec

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

Head to head
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

About

Live Spec

Transform your phone into a real-time car performance tracker and diagnostic tool. Monitor vital sensors, troubleshoot engine codes, and track fuel economy to save money. Features include customizable gauges, graphing, and race track data analysis.

Highlights
  • Real-time sensor tracking
  • Read and clear trouble codes
  • Fuel economy tracking
  • Customizable gauges and graphs
  • Race track data analysis
  • Speed limit warnings
  • HUD mode for night driving
Features
Read full description

Track performance of your car in real time by virtual gauges and graphs. Troubleshoot malfunctions by accessing the on board ECU. Know what is wrong with your car before taking it to the mechanic. Track fuel economy and save money on gas. These are just some of the features Live spec by Black Market Performance has to offer. Live spec transforms your phone/tablet into an all in one performance tracking and troubleshooting tool for your car. Live spec features: • Customizable gauges track up to 100 sensors in real time including fuel economy, G-force, gear display and battery voltage. • Read and Clear trouble codes and reset MIL (service engine light). • Metric and Imperial measures. • Real-time user-defined sensor plotting. Graph up to 4 sensors at the same time on interactive graph that can be scrolled, paused and selected. • Gauge list feature can track every sensor at the same time. • Freeze frame support (mode 02). • Instant horsepower, mpg/kpl fuel economy, boost pressure and G force tracking. • Read Vehicle VIN number, calibration ID and more (mode 09). • Speed limit warning: Get notified when driving over speed limit. • High oil/coolant temperature warning gives you instant notification when your car is running too hot. • HUD mode for dashboard view : Heads up display for driving at night. • Emissions test readiness. • Multiple ECU support. • Two themes to choose from. • Console mode for entering OBD commands. • landscape mode for all views. • Additional Cummins PIDs. • Extended PID support: Enhanced PID support for specific manufacturers (mode 22). • Fuel Economy: - Instant and average fuel economy tracking for 0-5 min, 0-30 min and 0-2 hr intervals and a detailed summary. - Long term tracking with six different intervals. (1 week, 2 weeks, 4 weeks, 13 weeks, 26 and 52 weeks). - 4 different units of measure: MPG,KPL (Km/L), L/100 Km, Miles per imperial gallon. - Interactive graph of long term data that can be cropped and scrolled through. - Export fuel history to CSV file (spreadsheets). - Other statistics: Distance travelled, average speed, money spent, CO2 produced and fuel consumed. - 3 methods of calculation available. For non MAF vehicles. • Race track package: - Real time lap data, gap delay time and position in race track using high frequency GPS tracking. - Comprehensive summary of race with lap times, speed fluctuations on track and more. - Get drag racing times (0-60 mph, 0-100 mph, 1/4 mile 1/8 mile etc.) - Load and save unlimited number of tracks onto device. - Crucial racing data including real time horsepower, g-force and a detailed driving summary. Share your results with friends. - Transmission gear information and optional shifting assistant which notifies optimal moment of shifting gears. - Customizable view that toggles between speed/rpm gauge, real time track positioning and G-sensor feedback. - Record your race in HD with gauge and track overlays. (dash cam add-on required) • Dashcam: Record smooth HD video with overlaying gauges (speed,rpm, etc), time, location (GPS coordinates) and G-force sensor in four different resolutions. You can record from 90 sensors and up to 5 gauges. • Sensor logger: You can record up to four sensors at the same time with 5 different refresh rates. Save graph sensor data to CSV file and export to PC/MAC for further analysis. Send real time data to TCP socket (IP Address) over network. - For fuel economy feature your vehicle must be equipped with MAF sensor. *** NOTE: A BMP Live spec OBD adapter or OBD2 Bluetooth LE adapter is required for this app to work. Support: livespectech@gmail.com Black Market Performance

Screenshots

Construction Master Pro Calc4 screens
Live Spec4 screens

Verdict

The call

The clearest difference is review sentiment: Construction Master Pro Calc at 60% against Live Spec's 0%. Construction Master Pro Calc also leads on price (Free vs $9.99) and rating (4.8 vs 3.9). Live Spec's advantage is in-app purchases (none vs 20) and iOS requirement (10.0 vs 15.0). On update cadence, 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

CostPrice · In-app purchases · Ads · Monetization

Construction Master Pro Calc is free to download; Live Spec costs $9.99 up front. Construction Master Pro Calc sells 12 in-app purchases, starting at $3.69 per month. Live Spec asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Construction Master Pro Calc holds the better App Store score, 4.8 against 3.9. That said, the two scores are not equally well evidenced: Construction Master Pro Calc has 40K ratings behind it against 8, so its average is the more settled of the two. Written reviews point the same way: 60% of Construction Master Pro Calc's written reviews are positive against 0% of Live Spec's.

UpkeepUpdate frequency

Construction Master Pro Calc ships an update every 3 weeks, Live Spec monthly. Both last shipped on October 24, 2026.

Scorecard8 real differences · 3 level
Construction Master Pro Calc versus Live Spec: the parameters behind the verdict, then further details
ParameterConstruction Master Pro CalcLive Spec
PriceFree — better$9.99
Rating4.8 (40K ratings) — better3.9 (8 ratings)
Positive reviews60.1% of reviews — better0.0% of reviews
Number of ratings40K — better8
Update frequencyEvery 3 weeks — betterMonthly
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
Best chart rank#49 — better—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.010.0 — better
Further details — not scored
Size111 MB10 MB
Age rating12+4+
DeveloperCalculated IndustriesAlphabit Software Inc.

Customer experience

Construction Master Pro Calc

All ratings39,604 ratings
Positive96.4%
Neutral1.2%
Negative2.3%
Written reviews323 reviews
Positive60.1%
Neutral5.3%
Negative34.7%

Live Spec

All ratings8 ratings
Positive75.0%
Neutral0.0%
Negative25.0%
Written reviews2 reviews
Positive0.0%
Neutral0.0%
Negative100.0%

Bugs and requests

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

Live Spec

Not enough reviews yet to summarise bugs or requests.

In-app purchases

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
None

Live Spec

No in-app purchases

Questions

Is Construction Master Pro Calc free?
Construction Master Pro Calc is free to download, with in-app purchases available.
Is Live Spec free?
Live Spec costs $9.99, with no in-app purchases.
Which has better reviews, Construction Master Pro Calc or Live Spec?
Construction Master Pro Calc is rated higher. Construction Master Pro Calc averages 4.8 out of 5 from 40K ratings, while Live Spec averages 3.9 from 8 ratings.
Do Construction Master Pro Calc or Live Spec have ads?
Neither Construction Master Pro Calc nor Live Spec shows ads.
Which is updated more often, Construction Master Pro Calc or Live Spec?
Construction Master Pro Calc ships an update every 3 weeks, and Live Spec monthly. Most recently, Construction Master Pro Calc was updated on October 24, 2026 and Live Spec on October 24, 2026.

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