Comparison

Construction Calc vs Sparky's CircKit

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

Head to head
About

Construction Calc

Features
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Designed by tradespeople, for tradespeople. Construction Calc Lite handles the heavy lifting of jobsite mathβ€”fractions, dimensional conversions, framing, and layoutβ€”so you can focus on the build. Whether you're a carpenter, concrete finisher, framer, superintendent, or DIYer, Construction Calc Lite delivers fast, accurate jobsite calculations with zero guesswork. WHY TRADES CHOOSE CONSTRUCTION CALC β€’ True Feet-Inch-Fraction Math: Add, subtract, multiply, and divide in full dimensional fractions down to 1/16th (or user-set precision) with automatic reduction. β€’ Seamless Unit Switching: Effortlessly mix Imperial and Metric. Convert feet-inch-fractions to meters, centimeters, or millimeters in a single tap. β€’ Split-Screen Display: View decimal values, feet/inch fractions, memory registers, and scale factors simultaneously in large, high-visibility text. β€’ Visual Cut & Layout Solvers: Dedicated modules for right triangles, miters, arcs, and baluster spacing complete with clear visual diagrams. β€’ 50 Memory Registers & Full History: Never lose a cut list or measurement. Easily recall previous calculations on the fly. DEDICATED MODULES FOR EVERY TRADE β€’ Framing & Layout: Calculate stud, fence post, and baluster spacing (horizontal, angled, or circular). β€’ Miters & Trim: Visual miter and bevel angle calculator for crown molding and finish carpentry. β€’ Geometry & Stairs: Instant solutions for right triangles, diagonals, rafter lengths, arcs, and chords. β€’ Concrete, Volume & Area: Quickly calculate slab volume, footings, room square footage, and block/tank capacities. β€’ Materials & Coverage: Estimate drywall sheets, tile, paint, and material costs with built-in waste allowances. β€’ Smart Blueprint Scaling: Instantly scale plan drawings up or down to true field dimensions. BUILT FOR THE JOBSITE β€’ High-Contrast Display: Large, legible fonts engineered for bright outdoor sunlight or dark crawl spaces. β€’ Works 100% Offline: No cell service required on remote sites.

About

Sparky's CircKit

This app provides essential electrical calculations and reference tools for electricians, contractors, and engineers. It offers advanced calculators for motor sizing, voltage drop, and more, alongside a professional reference library and built-in productivity tools.

Highlights
  • Motor sizing and protection calculators
  • Voltage drop calculator
  • Transformer sizing
  • Pipe and box fill calculators
  • Professional reference library
  • Integrated notes app
  • Unit converter
Features
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The essential electrical app for professionals. From motor sizing to voltage drop calculations, get instant results with tools designed for electricians, contractors, and engineers. Solve complex electrical problems quickly and stay compliant with the Canadian Electrical Code. AI-POWERED ASSISTANCE β€’ Ask Sparky, your new AI electrical assistant, for help with electrical questions β€’ Access Sparky through Siri on Apple Intelligence-compatible devices β€’ Get quick answers even when you're outside the app ADVANCED CALCULATIONS β€’ Motor sizing and protection calculators β€’ Transformer sizing with protection specifications β€’ Voltage drop calculations with wire derating β€’ Conduit and box fill calculators β€’ Arc flash incident energy calculator β€’ PVC conduit expansion calculator β€’ Redesigned and simplified Ohm's Law calculator β€’ Installation assistant for project guidance β€’ Recessed-light spacing for optimal layouts PROFESSIONAL REFERENCE LIBRARY β€’ Expanded Canadian Electrical Code reference library with 75 new code entries β€’ Wire and conduit trade-size tables with drill sizes and metric equivalents β€’ NEMA plug and receptacle configurations and enclosure ratings β€’ Data pinout references and phase colour codes β€’ Bonding sizes, burial depths, and strap spacing β€’ Torque specifications and wire reel estimator BUILT-IN PRODUCTIVITY TOOLS β€’ Integrated notes accessible anywhere in the app β€’ Completely rebuilt fraction calculator with a new tutorial β€’ Unit converter spanning 14 categories β€’ Code of the Day with optional daily notifications β€’ Find tools from your Home Screen or Lock Screen with Spotlight β€’ Share results without first saving them as notes β€’ Navigate to jobs using Apple Maps, Google Maps, or Waze DESIGNED FOR PROFESSIONALS Enjoy a clean, intuitive interface that now supports landscape mode and resizable windows. Sparky's CircKit delivers organized tools electrical professionals can rely on for accurate, code-compliant results. Whether you're running conduit, sizing equipment, or planning an installation, Sparky's CircKit provides the calculations and reference data you need to work efficiently and safely. FREE TRIAL, THEN YOUR CHOICE Start with a 14-day free trial that unlocks every tool. The trial is free, never renews and is never charged. When it ends, choose the plan that suits you: β€’ Monthly β€” $1.99 per month β€’ Yearly β€” $14.99 per year β€’ Lifetime β€” $39.99, a one-time purchase with no subscription Prices are in Canadian dollars and shown in your local currency elsewhere. Yearly subscribers can upgrade to lifetime access at a reduced price. ALREADY OWN SPARKY'S CIRCKIT? Nothing changes. If you bought the app before it became free to download, every tool stays unlocked for life. There is nothing to subscribe to and nothing to buy. SUBSCRIPTION TERMS Payment is charged to your Apple Account at confirmation of purchase. Subscriptions renew automatically unless auto-renewal is turned off at least 24 hours before the end of the current period. Your account is charged for renewal within 24 hours before the end of the current period. You can manage your subscription and turn off auto-renewal in your Apple Account settings after purchase. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy: https://www.thesparky.work/privacy/

Screenshots

Construction Calc4 screens
Sparky's CircKit4 screens

Verdict

The call

The clearest difference is price: Sparky's CircKit at Free against Construction Calc's $7.99. Sparky's CircKit also leads on iOS requirement (17.0 vs 26.0). Construction Calc's advantage is in-app purchases (none vs 4). On update cadence, ads and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Sparky's CircKit is free to download; Construction Calc costs $7.99 up front. Sparky's CircKit sells 4 one-off in-app purchases. Construction Calc asks for nothing beyond the download.

UpkeepUpdate frequency

Both ship on a similar rhythm, roughly weekly. The most recent releases landed on October 5, 2026 and October 9, 2026 respectively.

Scorecard3 real differences Β· 5 level
Construction Calc versus Sparky's CircKit: the parameters behind the verdict, then further details
ParameterConstruction CalcSparky's CircKit
Price$7.99Free β€” better
Positive reviewsβ€”84.6% of reviews
Update frequencyWeeklyWeekly
AdsNoNo
In-app purchasesNo β€” betterYes
Monetizationβ€”Paid
DevicesiPhone, iPadiPhone, iPad
Requires iOS26.017.0 β€” better
Further details β€” not scored
Size27 MB49 MB
Age rating4+4+
DeveloperSnappy Appz Inc.The Sparky

In-app purchases

None

Construction Calc

No in-app purchases

4 purchases

Sparky's CircKit

One-time4
  • $1 Tip$0.99
  • $5 Tip$4.99
  • $10 Tip$9.99
Show 1 more
  • $20 Tip$19.99

Questions

Is Construction Calc free?
Construction Calc costs $7.99, with no in-app purchases.
Is Sparky's CircKit free?
Sparky's CircKit is free to download, with in-app purchases available.
Do Construction Calc or Sparky's CircKit have ads?
Neither Construction Calc nor Sparky's CircKit shows ads.
Which is updated more often, Construction Calc or Sparky's CircKit?
Construction Calc ships an update weekly, and Sparky's CircKit weekly. Most recently, Construction Calc was updated on October 5, 2026 and Sparky's CircKit on October 9, 2026.

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