Comparison

Construction Calc Pro vs Stair Calculator

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

Head to head
About

Construction Calc Pro

This comprehensive calculator app is designed for construction professionals, offering specialized tools for measurements in feet, inches, and fractional inches. It includes modules for material estimates, conversions, area and volume calculations, trigonometry, and stair design, transforming your device into a powerful construction computer.

Highlights
  • Calculations in feet, inches, and fractional inches
  • Material estimation modules
  • Conversions for various units
  • Trigonometry and triangle solving
  • Stair and arc calculations
  • Fraction reduction and conversion
  • 50 memory slots
Features
Read full description

C-Calc Pro is a calculator app designed by, and for construction workers. Unlike a standard construction calculator C-Calc uses the power of the IPhone to create a construction computer. This full function calculator works as a standard calculator but more importantly allows you to work in feet, inches and fractional inches. The calculator also features several other modules for performing material estimates, crown moulding, conversions, area calculations and volume calculations, arcs and archs, trig and triangles, and stairwells and stairs. Contractors, architects, tradespersons, builders and even do it yourselfers will find this app ideal. Features include; - Add, subtract, multiply, divide, exponent, root and more with measurements in feet, inches, and fractional inches. - Reduce fractions and fractional inches to their lowest common denominator. - Convert decimal values to fractions and vice versa. - 50 memory slots to store, recall, add and subtract memory values. Memory values are shared between all modules as well. - Split screen shows result, memory, and measurement values all at once. - Calculate square footage and cubic footage easily. - Conversions for temperatures, distances, angles, areas and many more built in. - Help screen and full instructions included in program. - Estimate drywall, concrete, block, paint, tile, lumber and associated materials. - Transfer individual estimates to a running estimate sheet where you can keep track of your total as well as email the estimate to a man in the field, to yourself, or to the supplier. - Calculate surface areas and volumes of a large variety of shapes (including compound objects) for material estimates. - Crown moulding module built in which supports any spring angle and any wall angle. Actually see the saw settings on your phone. - Trigonometry calculator included for solving triangles, rise/run, rafters, slope, and more. Triangles are graphically mapped on your phone's screen to give a visual. - Advanced arc/circle calculator for solving arcs, radius, circumference, sector areas, sector angles, and circle areas. - Stair calculator for solving rise, run, unit rise, unit run, # of risers, # of treads, incline, stairwell opening, and stringer length. Drawings are to scale and may be easily printed or saved. Forget a bulky $100 calculator and simply buy the $10 app. The app will always be on your hip when you need it most instead of in the truck's glove compartment. C-Calc Pro has much more to offer in the coming months with free upgrades as well. We take our fellow tradesmen's opinions very seriously and the app will grow to reflect the people's opinion.

About

Stair Calculator

This app calculates essential parameters for stair construction, offering flexibility in input and providing multiple step set options. It supports various units and allows results to be easily copied.

Highlights
  • Calculate stair construction parameters
  • Flexible input for Run or Total Run
  • Determine largest and smallest step sets
  • Support for various units
  • Copy results to clipboard
Features
Read full description

Stair Calculator helps you calculate and compare staircase dimensions. FEATURES • Calculate using Run, Total Run, or Stair Angle • Enter a specific number of Runs or explore all calculated options • Support Metric and Imperial units • View detailed measurements and stair diagrams • Export results as a PDF or image • Copy results to the clipboard IMPORTANT Results are generated based on user-provided values and general calculation models. The app is intended for reference and educational purposes only. Please verify all measurements, local building requirements, and safety standards before actual construction. SUBSCRIPTION This subscription package offers unlimited access to all app features throughout the subscription period. • Payment will be charged to your Apple Account at confirmation of purchase. • The subscription automatically renews unless auto-renew is turned off at least 24 hours before the end of the current period. • Your Apple Account will be charged for renewal within 24 hours before the end of the current period, and the renewal cost will be identified. • Subscriptions may be managed and auto-renewal may be turned off in your Apple Account Settings after purchase. • Any unused portion of a free trial period, if offered, will be forfeited when you purchase a subscription, where applicable. PRIVACY POLICY https://13520178.github.io/StairCalc/policy.html TERMS OF USE https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ CONTACT If you have any questions or suggestions, please contact us. Email: phannhatd@gmail.com

Screenshots

Construction Calc Pro4 screens
Stair Calculator3 screens

Verdict

The call

The clearest difference is price: Stair Calculator at Free against Construction Calc Pro's $13.99. Stair Calculator also leads on rating (4.1 vs 2.5) and ratings volume (740 vs 11). Construction Calc Pro's advantage is in-app purchases (none vs 2) and review sentiment (42% vs 21%). 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

CostPrice · In-app purchases · Ads · Monetization

Stair Calculator is free to download; Construction Calc Pro costs $13.99 up front. Stair Calculator sells 2 in-app purchases, starting at $9.99 per year. Construction Calc Pro asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Stair Calculator holds the better App Store score, 4.1 against 2.5. That said, the two scores are not equally well evidenced: Stair Calculator has 740 ratings behind it against 11, so its average is the more settled of the two. Written reviews complicate that: 42% of Construction Calc Pro's written reviews are positive against 21% of Stair Calculator's, so the app with the better star average is not the one people write more warmly about.

UpkeepUpdate frequency

Construction Calc Pro ships an update monthly, Stair Calculator every 3 months. Both last shipped on October 24, 2026.

Scorecard8 real differences · 2 level
Construction Calc Pro versus Stair Calculator: the parameters behind the verdict, then further details
ParameterConstruction Calc ProStair Calculator
Price$13.99Free — better
Rating2.5 (11 ratings)4.1 (740 ratings) — better
Positive reviews42.1% of reviews — better21.4% of reviews
Number of ratings11740 — better
Update frequencyMonthly — betterEvery 3 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFree with in-app purchases — better
DevicesiPhone, iPodiPhone, iPad, iPod — better
Requires iOS8.0 — better15.0
Further details — not scored
Size6 MB1 MB
Age rating4+4+
DeveloperSnappy Appz Inc.Phan Nhat Đang

Customer experience

Construction Calc Pro

All ratings11 ratings
Positive27.3%
Neutral18.2%
Negative54.5%
Written reviews19 reviews
Positive42.1%
Neutral15.8%
Negative42.1%

Stair Calculator

All ratings738 ratings
Positive77.2%
Neutral5.0%
Negative17.8%
Written reviews28 reviews
Positive21.4%
Neutral7.1%
Negative71.4%

Bugs and requests

Construction Calc Pro

Not enough reviews yet to summarise bugs or requests.

Stair Calculator

Reported bugs

2 issues
  • Subscription numbers don't add up
  • Doesn't provide promised features after purchase

Requested features

3 requests
  • Option to uninstall app
  • Ability to calculate run based on rise and landing space
  • Provide more detailed diagrams and visuals

In-app purchases

None

Construction Calc Pro

No in-app purchases

2 purchases

Stair Calculator

Subscriptions1
  • Annual Premium Package7 Days trial$9.991 Year
One-time1
  • Unlock all features$5.99

Questions

Is Construction Calc Pro free?
Construction Calc Pro costs $13.99, with no in-app purchases.
Is Stair Calculator free?
Stair Calculator is free to download, with in-app purchases available.
Which has better reviews, Construction Calc Pro or Stair Calculator?
Stair Calculator is rated higher. Construction Calc Pro averages 2.5 out of 5 from 11 ratings, while Stair Calculator averages 4.1 from 740 ratings.
Do Construction Calc Pro or Stair Calculator have ads?
Neither Construction Calc Pro nor Stair Calculator shows ads.
Which is updated more often, Construction Calc Pro or Stair Calculator?
Construction Calc Pro ships an update monthly, and Stair Calculator every 3 months. Most recently, Construction Calc Pro was updated on October 24, 2026 and Stair Calculator on October 24, 2026.

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