Comparison

Construction Calculator Master vs Sparky Toolbox

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

Head to head
About

Construction Calculator Master

This advanced construction calculator simplifies complex measurements for builders, carpenters, and remodelers. It offers a comprehensive suite of math functions, multi-unit support, and visual aids for calculations involving fractions, trigonometry, and rafters. Reduce errors and save time with its intuitive interface and customizable options.

Highlights
  • Multi-unit fraction support (feet, inches, yards, metric)
  • Trigonometric functions with visualization
  • Rafter and triangle visualization
  • Imperial, Metric, and US Fractional units
  • Customizable fraction resolution
  • Memory and history functions
  • Dark mode support
Features
Read full description

Get ready for the next generation construction calculator. A must-have tool for fellow builder, carpenter, remodeler and handymen. Save time and reduce costly errors with our extremely easy to use construction calculator with full visual mode for all your calculations. This app features: - Easy to use with a comprehensive set of math functions. - Advanced multi-unit (feet inch fractions, yards, decimal feet, decimal inches and metric) fraction support - Full trig functions with visualization: sine, cosine, tangent, arcsine, arccosine and arctangent - Visualization of triangles, arcs, common and hip/valley rafters - Advanced calculation modes - Imperial, Metric, and US Fractional units - Customizable fraction resolution - Memory and History functions - Max, Min, and average calculation of values in memory - Dark mode support and much more. Download today and become a 10x builder! Terms of use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

About

Sparky Toolbox

This app provides 9 essential electrical calculation tools for field electricians. Streamline project estimating, bidding, and field verification with instant results for Ohms Law, wire sizing, voltage drop, and more.

Highlights
  • 9 essential electrical calculators
  • Ohms Law calculations
  • Motor and Transformer OCPD & Wire Sizing
  • Conduit Fill and Voltage Drop calculators
  • Standard Dwelling Load and Transformer Sizing
  • Solar Panel calculator
  • Designed for field use with a clean interface
Features
Read full description

Stop wasting time with manual paperwork or complex formulas. Built specifically for electrical contractors and field electricians, this app delivers fast, on-the-job preliminary calculations right from your phone. Whether you are estimating a project, bidding a job, or verifying field measurements, these 9 powerful calculators streamline your workflow and save you time. 9 Essential Calculators in One App Ohms Law: Instantly solve for voltage, current, and power. Motor OCPD & Wire Sizing: Determine Overcurrent Protection Devices and wire sizes for motors. Transformer OCPD & Wire Sizing: Get breaker and conductor sizing for transformer loads. Wire Selection & Sizing: Select wire size and matching OCPD for any specific application. Conduit Fill: Check total wire capacity limits for your conduit runs. Voltage Drop: Estimate voltage loss over long distances to keep your systems efficient. Standard Dwelling Load: Simplify residential service calculations in seconds. Transformer Sizing: Determine the kVA rating needed for your specific load requirements. Solar Panel Calculator: Input energy targets to find how many PV panels you will need. Why Electricians Love This App Built for the Field: Clean, high-contrast interface designed for easy use on busy job sites. Fast Estimates: Generate quick preliminary calculations to speed up project bidding. Lightweight & Fast: Opens instantly without lagging, saving you time when every minute counts. Download now and put a full suite of electrical tools right in your pocket!

Screenshots

Construction Calculator Master4 screens
Sparky Toolbox4 screens

Verdict

The call

The clearest difference is price: Construction Calculator Master at Free against Sparky Toolbox's $19.99. Construction Calculator Master also leads on ratings volume (436 vs 4) and iOS requirement (11.0 vs 13.0). Sparky Toolbox's advantage is rating (5.0 vs 4.3) and in-app purchases (none vs 10). 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

Construction Calculator Master is free to download; Sparky Toolbox costs $19.99 up front. Construction Calculator Master sells 10 in-app purchases, starting at $0.99 per 7 days. Sparky Toolbox asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Sparky Toolbox holds the better App Store score, 5.0 against 4.3. That said, the two scores are not equally well evidenced: Construction Calculator Master has 436 ratings behind it against 4, so its average is the more settled of the two. Written reviews point the same way: 70% of Construction Calculator Master's written reviews are positive against 100% of Sparky Toolbox's.

UpkeepUpdate frequency

Construction Calculator Master ships an update fortnightly, Sparky Toolbox every 5 days. The most recent releases landed on October 23, 2026 and October 24, 2026 respectively.

Scorecard8 real differences · 2 level
Construction Calculator Master versus Sparky Toolbox: the parameters behind the verdict, then further details
ParameterConstruction Calculator MasterSparky Toolbox
PriceFree — better$19.99
Rating4.3 (436 ratings)5.0 (4 ratings) — better
Positive reviews70.0% of reviews100.0% of reviews — better
Number of ratings436 — better4
Update frequencyFortnightlyEvery 5 days — better
AdsNoNo
In-app purchasesYesNo — better
MonetizationFree with in-app purchases — betterPaid
DevicesiPhone, iPodiPhone, iPod
Requires iOS11.0 — better13.0
Further details — not scored
Size37 MB23 MB
Age rating4+4+
DeveloperUncaught Exception IncTrinFJHTechSolutions LLC

Customer experience

Construction Calculator Master

All ratings436 ratings
Positive81.2%
Neutral5.5%
Negative13.3%
Written reviews10 reviews
Positive70.0%
Neutral0.0%
Negative30.0%

Sparky Toolbox

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews2 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

10 purchases

Construction Calculator Master

Subscriptions10
  • 1 week7 Days trial$0.997 Days
  • 1 week$2.997 Days
  • 1 week7 Days trial$2.997 Days
Show 7 more
  • 1 month7 Days trial$3.991 Month
  • 1 week7 Days trial$4.997 Days
  • 1 month3 Days trial$5.991 Month
  • 1 month7 Days trial$5.991 Month
  • 1 month$9.991 Month
  • 1 year7 Days trial$29.991 Year
  • 1 year7 Days trial$49.991 Year
None

Sparky Toolbox

No in-app purchases

Questions

Is Construction Calculator Master free?
Construction Calculator Master is free to download, with in-app purchases available.
Is Sparky Toolbox free?
Sparky Toolbox costs $19.99, with no in-app purchases.
Which has better reviews, Construction Calculator Master or Sparky Toolbox?
Sparky Toolbox is rated higher. Construction Calculator Master averages 4.3 out of 5 from 436 ratings, while Sparky Toolbox averages 5.0 from 4 ratings.
Do Construction Calculator Master or Sparky Toolbox have ads?
Neither Construction Calculator Master nor Sparky Toolbox shows ads.
Which is updated more often, Construction Calculator Master or Sparky Toolbox?
Construction Calculator Master ships an update fortnightly, and Sparky Toolbox every 5 days. Most recently, Construction Calculator Master was updated on October 23, 2026 and Sparky Toolbox on October 24, 2026.

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