Comparison

Mike Holt's Electrical Toolbox vs Circuit Wiring Simulator

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

Head to head
About

Mike Holt's Electrical Toolbox

This app provides essential calculations for electricians, inspectors, contractors, and engineers. It helps determine conductor sizing, circuit protection, race sizing, and grounding conductor sizes for various electrical equipment and services.

Highlights
  • Conductor sizing
  • Voltage drop limitations
  • Circuit protection sizing
  • Race sizing
  • Equipment grounding conductor sizing
  • Dwelling-unit service calculations
Features
Read full description

Mike Holt, the industry leader in the electrical industry (MikeHolt.com) has created an amazing, practical and useful app for the electrician, inspector, instructor, contractor and engineer. The app contains conductor sizing (including voltage drop limitations), circuit protection sizing, race sizing, equipment grounding conductor sizing for electric heating equipment (commercial and Residential), air-conditioning equipment (commercial and Residential), motors (commercial and Residential), Transformers (commercial) , and dwelling-unit service calculations and sizing.

About

Circuit Wiring Simulator

Features
Read full description

Circuit Wiring Simulator is the ultimate wiring diagram maker and circuit simulation tool for electricians, apprentices, and students. Create, test, and verify wiring diagrams with real-timecircuitsimulationandbuilt-introubleshootingtools—perfectforhome electrical systems, certification prep, and creative electronics projects. Whether you're planning residential wiring, studying for exams, or exploring industrial wiring scenarios, this app gives you the tools to bring your circuits to life — anytime, anywhere, with no ads and offline access. 1.Real-Time Circuit Testing Test wiring logic instantly as you draw. Identify short circuits, overloads, and faults with visual feedback. Learn from mistakes in a safe, risk-free environment — perfect for hands-on learning. 2.Efficient Circuit Design Drag, zoom, lock canvas, and undo/redo with ease. Design complex logic circuits and professional schematic layouts faster and more accurately than ever. 3.Massive Component Library Access 200+ built-in electronic components including switches, relays, contactors, motors, instruments, and more — everything you need for diverse circuit design projects. 4.Community Plaza — Share & Inspire Upload your own designs, browse and cite works from fellow electricians and hobbyists, interact via comments and likes. Spark creativity and level up your skills. 5.Hands-On Practice Scenarios Practice with real-world residential wiring and industrial wiring scenarios. Verify your circuits, enhance practical skills, and build safety awareness — all before touching a real panel. 6.Professional Schematic Drawing Rich symbol library and intelligent drawing tools help you create clean, standardized electrical wiring diagrams with professional quality. Who This App Is For: Electricians: Plan, design, and verify wiring layouts. Troubleshoot circuits before installation. Apprentices:Learnelectricalprinciplesthroughhands-onsimulationandvisual feedback. Students: Prepare for certification with realistic wiring exercises and exam prep scenarios. Enthusiasts: Design and share creative electronics projects with a global community. Circuit Wiring Simulator is an educational design tool, not a gaming console or system emulator. It helps you learn, practice, and master electrical wiring in a safe, simulated environment.

Screenshots

Mike Holt's Electrical Toolbox4 screens
Circuit Wiring Simulator4 screens

Verdict

The call

The clearest difference is in-app purchases: Mike Holt's Electrical Toolbox at none against Circuit Wiring Simulator's 10. Circuit Wiring Simulator's advantage is update cadence (every 2 weeks vs every 3 months). On price, ads, device support and iOS requirement 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

Both are free to download. Circuit Wiring Simulator sells 10 one-off in-app purchases. Mike Holt's Electrical Toolbox asks for nothing beyond the download.

UpkeepUpdate frequency

Mike Holt's Electrical Toolbox ships an update every 3 months, Circuit Wiring Simulator every 2 weeks. The most recent releases landed on October 26, 2026 and October 31, 2026 respectively.

Scorecard2 real differences · 8 level
Mike Holt's Electrical Toolbox versus Circuit Wiring Simulator: the parameters behind the verdict, then further details
ParameterMike Holt's Electrical ToolboxCircuit Wiring Simulator
PriceFreeFree
Rating4.6 (197 ratings) — better—
Positive reviews76.7% of reviews—
Number of ratings197 — better—
Update frequencyEvery 3 monthsEvery 2 weeks — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS14.0 — better15.0
Further details — not scored
Size26 MB48 MB
Age rating4+17+
DeveloperMike Holt Enterprises沛洁 赖

Bugs and requests

Mike Holt's Electrical Toolbox

Reported bugs

4 issues
  • Cannot email results
  • Video player widescreen exit bug
  • Previous calculation data not erased
  • App content is outdated

Requested features

6 requests
  • Increase transformer capacity to 225kva
  • Add option to print load calc
  • Update to NEC 2020
  • Add completion system for video series
  • Refine user interface for better usability
Show 1 more
  • Add more features, willing to pay extra

Circuit Wiring Simulator

Not enough reviews yet to summarise bugs or requests.

In-app purchases

None

Mike Holt's Electrical Toolbox

No in-app purchases

10 purchases

Circuit Wiring Simulator

One-time10
  • 30-day-discount0_9 VIP$4.49
  • 30-day VIP$4.99
  • 90-day-discount0_9 VIP$8.09
Show 7 more
  • 90-day VIP$8.99
  • One-year-discount0_9 VIP$14.49
  • One-year VIP$15.90
  • three-year-discount0_9 VIP$22.49
  • three-year VIP$24.99
  • Lifetime-discount0_9 VIP$31.49
  • Lifetime VIP$34.99

Questions

Is Mike Holt's Electrical Toolbox free?
Mike Holt's Electrical Toolbox is free to download, with no in-app purchases.
Is Circuit Wiring Simulator free?
Circuit Wiring Simulator is free to download, with in-app purchases available.
Do Mike Holt's Electrical Toolbox or Circuit Wiring Simulator have ads?
Neither Mike Holt's Electrical Toolbox nor Circuit Wiring Simulator shows ads.
Which is updated more often, Mike Holt's Electrical Toolbox or Circuit Wiring Simulator?
Mike Holt's Electrical Toolbox ships an update every 3 months, and Circuit Wiring Simulator every 2 weeks. Most recently, Mike Holt's Electrical Toolbox was updated on October 26, 2026 and Circuit Wiring Simulator on October 31, 2026.

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