Construction Master Pro Calc Customer Service
- Construction Master Pro Calc Customer Service
- Construction Master Pro Calc App Comments & Reviews (2026)
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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
• 4 Memories
APP-ENHANCED FEATURES
• Ask CMPro – exact steps for any calculation. AI built on CMPro’s 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
Construction Master Pro Calc App Comments & Reviews
Construction Master Pro Calc Positive Reviews
Construction Master ProI have used some version of this calculator for I believe the better part of thee decades now. I love the convenience of it being on my phone which is with 24/7. The only draw back is the screen shutting of and having to reopen my phone every time I want to enter something that it took a little bit of time to verify or measure. This could be changed in settings I am aware but as most of us, I don’t want my phone laying open indefinitely. For large projects I still use the stand alone calculator of the Construction Master Pro. The convenience of it always being with you without having to carry an extra device and how easy it is to load updates, makes it a must have for all serious carpenters or tradesmen. Well done! Ron.Version: 12.4.18
RecommendationI’ve been using this calculator for well over 20 years now. As a young man starting out in the trades, it was a big investment to buy $70 to have on the site, but I did it. As soon as the app became available, download it in 2005 or 2006 I have had no issues with the app or the calculators that I own they work extremely well, however, and that is a big however, when I recommended this app to my new hires, they told me it cost $20 a month. Since it’s clear people involved with calculators know how math works equivalent cost of this app over the next 16 years would be $3840!!! There is no way in good conscience that I can recommend this to any young man starting out in the trades. Any calculator can do this math for you. It just not worth it..Version: 12.5.42
Best little calculatorI had purchased the stand alone calculator many years ago and the app at least 4 year’s ago. The calculator holder on my tool belt is a perfect fit for my phone. This is a great app as well as the stand alone. Best of all the help and manual is one click away if happen to forget the keystrokes for the stair layout or any other function. The app is similar in cost to the stand alone, but I would still own both. When I do not have phone in my tool belt the calculator is there. The new calculators have a tough plastic shell and the older version have an opening cover like a notebook. So I guess I own three. This is a great calculator layout for a builder..Version: 12.5.11
Great valueWhere do I start singing the praises for this app? Let’s start with the construction master calculator itself. It is an invaluable tool for figuring roofs alone, but so much more. When you have the app on your phone it is always handy and at your fingertips. I purchased the app many years ago, and it transfers every time I replace my iPhone. I probably would have worn out several calculators in the time I’ve had this app. Cool thing is, when there is an upgrade, it downloads and I am up to date in minutes. I cannot live without the Construction Master Pro. Just sayin..Version: 11.4.10
Construction calculatorI found the original construction calculator at least 15 to 20 years ago. I have used them ever since that time, I have always had a couple in my truck one in the office one of my briefcase and several of them I have dropped broken over the years and had to replace. When I was looking to buy another new one I saw that they had the app online and now with it having it on my phone I have two on my desk there’s none in my truck there’s none in my briefcase it all works right off the phone and I haven’t broken it once. If you are in construction of any kind you should have this app on your phone..Version: 10.9.3
Right ToolI’ve worked in the constriction line of work 40 years. Like most people in this line of work, the task at hand have changed from time to time. I have roofing, structural framing which includes difficult stairs calculations and radius form work and layout, concrete work, cabinet building, brick and block work, interior finishing ( suspended ceilings, flooring,) . This tool, like all other tools used in the users tool box, is quality, speed, accuracy oriented. Get it and never worry about getting the information you need..Version: 12.10.24
Carpenter mustIf you are doing Carpenter work, this app is a must. It will do everything that you need it to do. It will help you in many ways. If you are a master, it will bless you. If you’re an amateur, it will aid you. For one, computing in inches and fractions is great. To change from metric to English is very easy as well. The rise and run feature is very useful to me. I have a degree in math, so I use it for many computations. We used to pay over a 100 dollars for a construction master pro calculator. Now it is on your phone..Version: 12.10.31
GREAT Calculator!I’m just a DIYer handyman, with some mechanical aptitudes. Although I’m not a professional, I love this calculator for my woodworking projects and home improvement/repair projects. It’s a whole lot easier than trying to figure the calculations out in my head. I’ve had a physical version of this for years. But some of the improvements in this app are truly amazing. Whether you’re a professional or, especially if you’re a DIYer like me, I would HIGHLY RECOMMEND that you add this tool to your toolbox!.Version: 12.0.10
Keep it simplePlease allow me to keep the calculator in full screen mode. I should not have to hit the full screen tab every time I open the calculator. I’m constantly hitting the home and help buttons by accident. I hear button clicks, but it doesn’t always register on the calculator. I’m having to redo calculations almost every time I use this calculator now. I’m also pretty sure there’s some glitches in the software calculations as well. These are all new problems in the last few months that I’ve never had in 30 years of using this calculator. This has always been a 5 star app, but not now..Version: 12.5.20
Last of a dying breedHave used the calculator app for over 12 years. Had a handheld model in our job trailer (right next to the rafter table book) when I began framing 30 years ago. It has made figuring stairs and roofs quicker and more accurate. With the programmed tolerances I can jump from commercial to residential stairs with ease. Checking work on stepped out rafters keeps everything square, level and plumb. From rafter jacks to yds of concrete in a footing. This app pays for itself..Version: 12.5.42
Thank youThis is the absolute must have calculator that you have to have if you’re gonna do anything and construction, I’ve had the Calculator around the shop for years. That we have used and still use to this day. When my boss told me about the app and made me get it. That was the thing in the world, complete game changer! I use everyday in every aspect imaginable. I want to say thank you master pro calculator for having the best thing since sliced bread! Y’all are amazing.Version: 12.5.42
This will help your careerI have had this on my iPhone for a very long time. Super convenient because you normally always have your phone on hand, not always a calculator when you need one in the field or shop. I have used this as a metal fabricator, structural fitter, ironworking in buildings, plants and working on large ships. This app is always updated with newer software which you cannot do with a calculator. If you use a calculator in the trades, just get this app..Version: 12.1.2
Excellent AppIf you’re making a living in the trades, you need this app. Always with me because it’s on my phone, not a separate device that I could easily forget or leave somewhere by accident. I use this app nearly every day. I’m a residential builder/remodeler and this is a go to app for roof framing, layout, gable walls, stairs, concrete, blocks, and brick takeoffs just to name a few. I am always finding new ways to use this app. Highly recommended..Version: 11.4.26
Best Calc app for construction!I love this app and use it every day in the job. It can do many things and has a help section to show you the proper way to figure for your project. The only thing that annoys me about this app is that every time it updates it turns key clicks back on which I hate. I’m just turn them back off but at least save my settings. But still easiest 5 star rating ever.Version: 12.1.11
Great calculatorHave used my desktop model for 30 years and couldn’t live without it until this app. Although the giant desktop is great for crunching numbers at home I always use the app on the job site. A bit pricey but worth it if you want an in depth construction calculator and especially if you are already familiar with the format of the non virtual model. Have no regrets about buying..Version: 10.9.1
It’s always with meAs a GC I have used a Construction Master almost daily for years. It’s the industry standard. The problem was I would use it at my desk while working on a bid and not have it in the field the next day, or reach for it in while pouring over a set of plans only to realize it was in my bags in the truck. Not anymore! My phone is always with me and now so is my Construction Master..Version: 12.0.10
Was a good deal with app purchase till updateWas a great tool with a simple one time fee till the last update . Now I get the pleasure of having to login in to apple each time I use it cause they decided to make it a subscription . Sorry I’d use my real construction master over that any day of the week . I would like this fixed but I’m sure it’s gonna take a long time . I’ll use it till they will not let me , but I regret not waiting 24 hours on any updates. I paid for this app along time ago already..Version: 11.4.2
Beware : SubscriptionBe aware that this app has been changed to a subscription based model, rather than the outright purchase it used to be. The text description has not been changed to reflect that fact. 20 May 2023: Change log for new update is an ad for a different item. Wonder what they've taken from us this time..Version: 12.1.11
Amazing app, subscription is killing itI own this app, have purchased for my iPad, I have recommended it to every architect, engineer, and subcontractor I know, and yesterday when purchasing for my sister we found out there’s a subscription… sadly, I cannot recommend a subscription app when Home Depot sells them for $40-$50… I wouldn’t mind if you were to increase the price for such useful app, but a subscription really is killing it for me… I hope you are able to bring back this app….Version: 12.1.2
Great app but didn’t transfer when I switched phonesI switched phones a couple weeks ago and the app didn’t transfer and now it’s asking for me to pay a yearly fee to use it. I would really like if I didn’t have to seeing as I already bought it and it just didn’t transfer but if I have to please let me know.Version: 11.4.10
Handy on the JobsiteUseful tool to have when walking the job site. Much easier than having to carry a full size calculator. I think $25 is a little more than it should cost personally, but it’s still cheaper than the real calculator. One complaint I have is the App icon looks very dated aside the rest of the apps on my phone. Hopefully that isn’t a sign that it no longer receives updates, or that it will become incompatible with new iOS versions..Version: 10.7.0
Great purchaseI’ve bought this actual calculator several times and had to replace it because I lost it or drove over it. Then I bought the app, and it is always in your pocket and an essential tool to have no matter what kind of construction you do. I currently still own one of the real calculators, but I use the app everyday..Version: 10.9.1
Better than the actual calculatorI have been using this calculator for years as a concrete business owner. After breaking and losing so many of these I finally just downloaded the app and boy was I pleased. It's crisper easier to use and honestly going to save me money and heartache when I can't find my Calc. Ty for this Very satisfied customer.Version: 1.5.0
One more option……please!Love the new design. Could you make it an option to open in full screen…that’s my preferred layout when using this app, however, I know I may be speaking only for myself but would be nice to only show Home, Saved Tapes & Help when need be since these are functions I rarely use. Thanks so much!! Kevin.Version: 12.5.11
Awesome calculator!!I’m somewhere in between professional and DIYer and this calculator is just the most handiest tool I’ve got!! There are still a lot of functions im still learning and bought this app 3-4 years ago, it almost has no limit on what I can do with it! And I’ve already recommended it to a friend… Review follow up- btw I love the new look!!!.Version: 12.5.20
All you needI might have 9 of there calculators in truck,office an even buy the bed. To be able an have it on your phone is awesome.. you always have your phone.. well worth the $. If this is what you do for a living your not even reading these reviews you already have it an love it..Version: 12.8.3
Delayed clicking soundAbsolutely, top-notch app and interface, but for some reason, the latest version has a click sound that is slightly delayed from when you hit the button, very annoying when inputting quickly..Version: 12.5.42
Something has changedSince the last upgrade somehow the keys on the iPad and iPhone don’t respond to the calculator. The results don’t always come out right. This can be very scary. Usually I double check it knowing this flaw in the new version of the software. But it can’t be half right..Version: 12.5.11
Recently very disappointedI used to absolutely love this app... But recently it now needs cell service to initiate.. I work in very rural areas without cell service often... And now the app won't work in those areas. I paid quite a bit for something that now does not work all the time..Version: 10.9.1
Awesome AppI’ve had this version for a few years now and it still has much more features than I even use. Makes calculating square footages a breeze and converting ft. To decimals basically effortless! You won’t be disappointed with the purchase of the full version for sure!.Version: 12.10.16
Great ToolI like everything except I don’t know how to erase ONLY the last digit put in by mistake,so you have to delete and start all over. My old stand alone model had a backspace arrow,so you don’t lose all of your calculations. That’s all. Somebody’s gonna let me know how to do it. I just know it. I hope so!!.Version: 12.1.2
Great app, great serviceUse the app all time for my trim carpentry work, when switching phones, had a little issue finding my existing purchase, wrote an email to customer support and within 2 or 3 minutes was up and running. One of my favorite apps.Version: 12.5.23
Great for fencingWorks great to layout fencing jobs especially if you’re not using a tape with tenths because it adds fractions. That’s just the tip of the iceberg; if you educate yourself on the many functions of this app, you can basically layout most any construction project. Thanks for a great product!!!.Version: 12.4.18
Great calculatorThis thing will build anything if you know how to use it. Way better on the app than the actual calculator because you have instructions right here. Don’t have to worry about carrying a book around or finding it for losing it..Version: 12.1.14
No millimeters?Just 2 days past the trial period and went to use this and realized there is no millimeter or centimeter button, without an extra step. No button as there is on the hand held calculator. Nevertheless, the app is clear, easy to use, and support is great so I will keep it..Version: 12.10.11
Early purchaserApp is great and works just as intended. Only giving four stars because of the yearly subscription price. Your price is outrages thankfully I bought the app years ago when it was a one time purchase for like $25. Other than that though it really is phenomenal and great to have on my phone but not worth $40 a year imo..Version: 12.1.11
Great CalculatorThe support is good because they are video tutorials that you can read on how to. The digital paper printer function is extremely helpful for you to review your work and saves time. Would definitely recommend to someone and have..Version: 10.9.3
Owner D.R. Woodworks Portsmouth, NH.This is not another feet and inch calculator, it’s obvious the developers work in the building trades or sought the input of professional tradesmen. My only complaint is that another piece of technology has made a lot of our hard earned knowledge available to any idiot with five bucks and a smart phone!.Version: 10.9.3
The Best!I don’t know the number of times I have used this app. It is the best for laying out your plans and projects from herring bone floors to windows and doors to figuring out the number of stds to just about anything you could wish for. It helps so much in translating foot and inches to mm and cm to meters!.Version: 12.8.8
Calculator disappears ….major glitch!!This is a Major glitch. Every time I try to open the app it disappears. I’ve paid for this app and updated it and it still does not work. Please fix this as soon as possible or give me a refund!.Version: 12.1.11
Awesome!!Works flawlessly. It is exactly like the $110 calculator in the stores. Worth every penny! I’ve used it everyday for years without incident.Version: 1.5.1
This is ridiculous and fraudulentAs a third generation carpenter, I trusted the ConstructionMaster name, but this is ridiculous. I paid for this app and now it’s running ads on me. I could understand if there was some need for a new edition and I chose to ridiculously buy it/subscribe, or even if there was a need for updates, but it’s the same functionality as the calculator I’ve had for 20 years. Good to know that if they could put microtransactions and ads on my physical calculator that they would. Utter garbage behaviour from a once reputable company. Zero stars isn’t an option..Version: 12.6.3
Would be 5 if it was not for these addsAdds on a paid app?!!!! REALLY??.Version: 11.4.2
ContractorLove this app before I used the actual tool but this is awesome.Version: 12.10.31
Great app!Very handy tool for construction.Version: 12.10.31
Awesome CalculatorEach person in my team has a construction maste pro, and I have had a calculator for about 15 years during my construction life. I hope they come out with one that also has conversions for RSI to R values and some others which we need for our Building design company..Version: 12.10.31
Master carpenterThis calculator is a must have for stairs roofs and estimates it makes my life easier and I’m sure it will do the same for you. I wouldn’t hesitate to recommend it to any and all people involved in the construction industry..Version: 12.9.9
Construction master pro reviewI use it every day at work. Well worth the money..Version: 12.8.8
Game Changer!This app has been a game changer. I don’t even know how many years I’ve had this app. In previous years before I got the app. I had the actual calculator that was very expensive . They got dropped , or were dropped upon and the job basically came to a standstill . I make sure the main guys on our site have this app, and would recommend it to anybody in the construction industry..Version: 12.6.5
SimpleGood calculator for this guy. Had it for over 12 years. Don’t go into the weeds with the calculator but promote to all our employees. Shame they charge an annual subscription now..Version: 12.6.5
Zero audio in demo videosI turned off Bluetooth and made sure my audio worked on other apps yet no audio on the demo vids played through the app. And yes I toggled to onscreen mute button too. Solid app otherwise, insane amount of features.Version: 12.5.42
Subscription based appClearly this one the best calculators out there but I bought mine years ago. I have new apprentices on the crew that I wanted to all use the same calculator and I suggested this one. I opened up the app and to my shock and dismay saw that it was now subscription based! Which is an immediate turn off for anyone interested. Who wants to pay 50$ a year perpetually for a calculator??.Version: 12.5.42
Stop interruptionLike the app. But the beef I have it’s the interruption when I open the app (survey, updates, messages etc). When I open the app is to calculate now..Version: 12.5.20
For proIt’s a great tool for calculate everything in job site.Version: 12.5.20
Best calc app for constructionBest calc app for construction. Extremely useful in Canada, BC. Here we still use both systems metric and imperial unfortunately. The app helps switching between the systems..Version: 12.5.11
Best tool on the Job SiteI purchased the Construction Master calculators early on and used them for every volume, measurements, stairs and rafters, squaring layouts, doing material take offs ever since. I’ve had the app since it came out and continue to use it on all of my devices it’s awesome! I’ve been a Carpenter and Supervised medium sized construction sites for over 25 years and these products have been used throughout all projects large and small to make quick work of the tasks at hand..Version: 12.4.13
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