Best Voltage Lab Apps

250+ iOS apps curated and reviewed

4.2 avg rating

16 free apps

Updated September 2026

Every iPhone needs a few good voltage lab apps. We benchmark 250+ of them on App Store rating, freshness, and pricing, then surface the standouts so you don't have to scroll the App Store yourself.

Compare top Voltage Lab Apps (September 2026)

#	App	Price	Rating	Ads	In-App Purchases	Updated
1	VoltageLab: NEC Exam Prep	Free	5.0★ (1)	No	Yes	Sep 2026
2	Electrical Systems Visual Lab	$1.99	—	No	No	Jul 2026
3	VoltLab: Interactive Physics	Free	5.0★ (363)	No	Yes	Sep 2026
4	Circuit Laboratory	$5.99	3.0★ (2)	No	No	Aug 2026
5	MasterElec - NEC Code Guide	Free	5.0★ (4)	No	Yes	Sep 2026
6	AC Lab System	Free	—	No	No	May 2026
7	Southwire® Voltage Drop Calc	Free	4.6★ (1.5K)	No	No	Sep 2026
8	Lab Assist: The Lab Assistant	Free	—	No	Yes	May 2026

Top Picks for Voltage Lab

VoltageLab: NEC Exam Prep by Nazmul Islam

Pass the NEC Exam Faster

Editor's Choice

📚 Education

5.0(1 ratings)

FreeIn-App Purchases

Prepare for electrician licensing exams with AI-powered practice tests and personalized study plans. Track your progress, identify weak areas, and simulate real exam conditions to ensure you're ready to pass.

Electrical Systems Visual Lab by Yuhsiu Lai

NEC Code Simulations & Tools

Strong Contender

📚 Education

0.0(0 ratings)

$1.99

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VoltLab: Interactive Physics by Denis Gladkii

Your discovery lab

Worth Considering

📚 Education

5.0(363 ratings)

FreeIn-App Purchases

VoltLab: Interactive Physics screenshot 1

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This app simplifies learning electricity through interactive lessons and visual experiments. It offers offline access, quizzes with detailed solutions, and a reference guide for formulas. Ideal for students and educators seeking to understand electrical concepts.

More Voltage Lab apps to explore

Circuit Laboratory

by Fabrizio Boco

$5.99

Analyze electronic circuits with DC, AC, multifrequency AC, and transient analysis. Draw circuits graphically, modify component parameters, and view voltage and current graphs. Supports various components and offers video tutorials for each.

DC, AC, Multifrequency AC, and Transient AnalysisGraphical circuit drawingComponent parameter editing

📊 Productivity

(2)

paid

MasterElec - NEC Code Guide

Electrical Voice Assistant

Free

A voice-powered assistant for electricians that provides offline access to NEC references and professional calculators. Quickly get answers to code questions and perform calculations without needing an internet connection.

Voice-first interface for queries100% offline functionalityNEC reference access

Manage and book research equipment, access detailed records, and stay updated on lab news. This application facilitates efficient resource allocation and information dissemination within research environments.

Schedule and book research equipmentAccess and search equipment informationView research records

📚 Education

(0)

free

Southwire® Voltage Drop Calc

Southwire Calculator

Free

Calculate the appropriate wire size for electrical circuits. This tool helps determine wire size based on voltage drop and current carrying capacity, ensuring compliance with NEC ampacity limits.

Determine wire size for voltage dropCalculate voltage drop for conductor runsLimit wire size by voltage drop

🔧 Utilities

(1.5K)

free

Lab Assist: The Lab Assistant

The Laboratory Companion

This engineering utility calculates unknown values in a voltage divider circuit. It can solve for voltages or resistor values, displaying ideal and actual resistor options. It also shows current, power, and voltage tolerance.

Solves for Vin, Vout, R1, or R2Resistor picker with actual valuesDisplays ideal resistor value

🔧 Utilities

(3)

paid

ST Voltage Regulators Finder

by STMicroelectronics International N.V.

Free

💼 Business

(0)

CloudLabs Sinusoidal Current

Simplify Instrument Teaching

This utility measures electrical parameters like voltage, current, and power. It offers real-time monitoring of battery capacity and includes advanced protection functions. The app also supports data export and remote control via a mobile app or host computer.

Measures voltage, current, power, and capacityReal-time battery monitoringOver-voltage, under-voltage, and over-current protection

by Xi'an Xinpai New Energy Vehicle Power Control Research Institute Co., Ltd.

by Hangzhou Junce Instruments Co., Ltd.

Daylight for Customers

Substation Engineer Suite

3D Models, Drawings & Toolkit

FAQ about Voltage Lab

What are the best voltage lab apps for iPhone?

VoltageLab: NEC Exam Prep tops our voltage lab apps ranking as of September 2026, with a 5.0-star average from 1 App Store ratings, and it's free to download.

Are there free voltage lab apps for iPhone?

Yes — 16 of the top voltage lab apps we rank are free to download, including VoltageLab: NEC Exam Prep and VoltLab: Interactive Physics.

Does VoltageLab: NEC Exam Prep have ads or in-app purchases?

VoltageLab: NEC Exam Prep has no ads and offers in-app purchases, according to its App Store listing as of September 2026.

How many voltage lab apps are on the App Store?

We track 250+ voltage lab apps on the iOS App Store as of September 2026, ranked by rating, recency, and analysis of real user reviews.

What electrician exams does VoltageLab prepare you for?

VoltageLab prepares you for the Journeyman Electrician Exam, Master Electrician Exam, NEC Code Exam, State Electrical Licensing Exams, Electrical Contractor Exam, and Apprentice & Trade School Exams.

How does VoltageLab help users know if they are ready for the exam?

VoltageLab provides a real-time Readiness Score, which indicates your exact pass odds. It also highlights specific NEC articles that are costing you points, allowing for targeted study.