SparkAI
Asks the calculator first and the model last. It will not state a conductor size, a breaker size or a code citation on its own — those come from a solver or the book, never from a paragraph.
Field reference · Training · Job records
The trade app that tells you when it doesn't know.
Calculators, a wiring simulator with a real solver behind it, generated troubleshooting, job documentation, and an AI that refuses to guess at anything you might wire.
Free to use · Pro $7.99/mo · No account needed to start
23
Tools in the app
270
Troubleshooting scenarios
51
NEC sections in the citation register
5/12
Data tables checked against the printed book
Why this one
Every competitor claims accuracy.
This one shows its working.
A number without its method is a rumour. Every answer carries what went in, how it was worked out, and where it came from — and when it rests on something unverified, it says so on the answer rather than in a settings screen.
Wiring Simulator
Single-pole through four-way, graded by a real solver. Wire a three-way backwards and it tells you exactly what a meter would read — because it worked it out, not because somebody wrote that case down.
Troubleshooting
270 scenarios generated from real faults. You get the complaint first, then you earn the readings — and if you answer while four faults still fit, it tells you that you guessed.
Job Cam & Projects
Photograph the trench before the concrete goes on. Photos, logs, calculations and permits sit on one job with a timeline that never closes.
Calculators
Conduit fill, box fill, voltage drop, ampacity, bending, panel schedule, estimating. Free, unlimited — these are why you open it the first time.
Permit Assistant
What the inspection usually covers, the corrections that actually get written up, and the questions to ask your AHJ — with somewhere to keep what they tell you.
The work
Built by the trade, for the trade.
Wiring Simulator
Tap a conductor and find out what it's doing.
Not a definition of a traveler — what this conductor is doing in this circuit, in every switch position, solved by the same engine that grades the lesson.
- A switched leg with the switch off isn't floating — the lamp ties it to the grounded conductor, and a meter shows a solid zero.
- An open conductor is never called "0 V". It'll read 40 or 60 volts of nothing, and being told to expect zero is how you decide your meter's broken.
- Expert mode doesn't highlight the right terminal. Being able to build it wrong is the only reason building it right means anything.
Traveler · three-way, source at switch
SW1 up · SW2 upline volts
SW1 up · SW2 down~0 V · pulled low
SW1 down · SW2 upline volts
SW1 down · SW2 downopen
Exactly one traveler is hot at a time. Nothing here is written down per lesson, so it stays right when the circuit is wired wrong.
Troubleshooting
A service call, not a multiple-choice question.
Most apps hand you the symptom, the meter readings and four answers at once. That's a reading exercise. Here you get the complaint, and you earn everything after it.
- Each step costs time and rules out what it actually can — the app can't claim a check narrowed something it didn't.
- Ring out a live circuit and it stops you, says why, and puts it in the report above your score.
- Open the boxes before you commit and it says so: that's reading the answer, not finding it.
"Only works when the hall switch is up"
1
Read the complaint
Their words. Rules out nothing.
2
Walk in and try it
Free, and rules out more than anything else.
3
Take readings
15 minutes. Separates what the switch can't.
4
Kill it and ring it out
Blocked — the circuit is still energized.
5
Open it up
Ends the exercise. You're looking at the answer.
Permit Assistant
What usually fails, and what we won't guess at.
A failed inspection costs a week, and most of them are caught by walking the job once with the right list. So the corrections that actually get written up ship as content — and everything jurisdictional ships as a question with somewhere to record the answer.
- Cable support, nail plates, box fill, working clearance, bonding — every item is something you check yourself with a tape measure.
- No turnaround figures. "Usually two to three days" is a number you'd schedule a drywall crew around, and we don't know it for a single jurisdiction.
- Whatever your AHJ tells you gets recorded, and the app uses it for that jurisdiction from then on.
Rough-in · new branch circuit
✓
Count every conductor, yoke, clamp and ground 314.16
Run box fill on the tight ones.
✓
Check every stud and joist bore 300.4(A)(1)
Anything close to the face needs a plate.
✓
Confirm every box is accessible after finish
Splices nobody can reach are the classic one.
Working through it doesn't guarantee a pass, and it isn't a substitute for the adopted code, the approved plans, or your inspector.
Nothing is isolated
One job. Everything on it talks to everything else.
Most trade apps are a drawer of unrelated tools. Here, a photo becomes a takeoff, a takeoff becomes an estimate, an estimate becomes an invoice, and all of it stays attached to the job — so when a number changes upstream, the app can tell you what downstream is now out of date.
01
Job Cam
Photograph the trench, the rough-in, the panel before the cover goes on.
02
Takeoff
Count devices off the sheet. Nothing is confirmed until you confirm it.
03
Estimate
Material and labour off counts you already verified.
04
Invoice
Built from the estimate, not retyped from it.
05
Project archive
Photos, logs, calculations and the permit, on one record.
06
Warranty call
Three years later, the same record. Including what was under the slab.
Every derived artifact remembers what it came from. Change the takeoff and the app tells you the estimate built on it is stale — rather than letting you send a bid off a number that moved.
Job Site
Interactive training, not an arcade game.
Walk a commercial rough-in. Ten stations, real work at each one — and the work is the app. Step up to the garage panel and the wiring simulator opens on that circuit. Walk to the bench and it's the bender.
- The crew checks your work before signing it off.
- It's the same solver and the same scenarios as the rest of the app — the site is a wrapper, never a second copy of the tool.
- Free to walk. You don't need Pro to learn.
Stations
✓
Bedroom — single-pole light
Standard switch loop, feed at the switch.
✓
Kitchen — switch loop at the light
Feed lands at the fixture instead.
3
Living room — three-way lighting
Two doorways, one light.
4
Garage — the panel
Locked until the three-way is signed off.
Where it differs
Most electrical apps are a table of numbers.
| SparkConnect | Typical electrical app | |
|---|---|---|
| Calculators | Show inputs, method and source | Return a number |
| Circuit training | Solver grades what you built | Diagram to look at |
| Troubleshooting | Generated, with progressive reveal | Fixed quiz bank |
| AI | Refuses rather than guesses | Answers everything confidently |
| Source verification | Published, table by table | Not stated |
| Job documentation | Photos, logs, permits on one job | Separate app, or none |
| How it fits together | Artifacts remember their source | Unrelated tools |
What we check, and what we haven't
Nobody else in this category publishes this. That's the point.
SparkConnect's calculations rest on tables printed in the National Electrical Code. We track which of those we've checked against the printed book, by hand, and which we haven't — and anywhere an answer rests on something in the second list, the app says so on the answer itself.
- Checked against the printed 2023 NEC
- Conductor properties (Chapter 9, Table 8) · Box fill volumes (314.16(B)(1)) · Small-conductor limits (240.4(D)) · Conduit fill counts (Annex C, Table C.1) · The circuit engine
- Not yet checked
- Ampacity tables · Grounding and bonding conductor tables · Parts of the conduit dimension tables · The citation register itself
We are not the authority having jurisdiction. Nothing in the app is a substitute for the adopted code, approved plans, or your inspector.
Pricing
The calculators are free. Forever.
They're why you open the app the first time, and putting a meter on them would be the fastest way to lose you. Pro is for the parts that keep working after you close it.
Free
$0
For the apprentice who needs an answer on a ladder.
- Every calculator, unlimited
- Daily code question
- The job site, and the first simulator lessons
- A few SparkAI answers a day
Pro · most popular
$7.99 / month
For the electrician running their own jobs.
- Everything in Free
- SparkAI without the daily ceiling, and voice
- The full simulator and troubleshooting libraries
- Unlimited projects, photos and exports
or $49.99/year · cancel anytime in the App Store
Lifetime Tools
$29.99 once
For the person who doesn't do subscriptions.
- The core calculators, permanently
- One payment, no renewal
- A daily SparkAI allowance
Prices in USD and may vary by region. Subscriptions renew until cancelled and are managed in your App Store or Google Play account.
Questions
Straight answers.
Can apprentices use it, or is this for foremen?
It's built for apprentices first. The calculators, the simulator, the daily code question and the job site are all free, and Projects exists so you can photograph a trench before it gets covered — not so somebody can run a schedule. If you've ever been asked "what was under there?" six months later, that tab is for you.
Does SparkAI replace the NEC?
No, and it's built specifically not to pretend otherwise. SparkAI may explain a concept and point you at the right tool. It is not permitted to state a conductor size, a breaker size, an ampacity, a grounding method or a code citation on its own — those come from a calculator or from the reviewed reference. When it can't answer with full confidence, it says so and hands you somewhere to go instead.
Does it work offline?
Every calculator, the simulator, troubleshooting and your projects work with no connection — they're computed on the device. SparkAI needs a connection. If you lose signal the app degrades to "deterministic only" rather than to "nothing", which is deliberate.
What's the difference between Pro and Lifetime Tools?
Lifetime Tools is a one-time purchase for the core calculators, kept permanently. Pro is a subscription covering the parts with an ongoing cost behind them — SparkAI, the full training libraries, unlimited project storage and exports. Lifetime is not a cheaper Pro; it's a different product for someone who wants the tools and nothing else.
Can contractors use it for real jobs?
Yes — Projects, daily logs, panel schedules, estimating and exports are built for that, and exports are scoped by audience so what a customer sees isn't what an inspector sees. It is not a replacement for a full project management system, and it doesn't pretend to be one.
Does it find contractors, or verify licences?
Licence verification opens the issuing board's own record — we don't keep a copy, because a cached licence status is a status from whenever it was cached. Contractor search and nearby contractors are not built yet. They need public records we haven't imported, and a search box over an empty database is worse than no search box.
Free tools & references
Answers on the web, too.
Every one of these answers the question fully on the page. No email wall, no "download the app to see the result" — a page that withholds the answer reads as a trick and ranks like one.
Get the answer, and the reason for it.
Free to start. No account needed.