# CircKit USA — NEC Reference & Trade Tools

> NEC Reference & Trade Tools (iPhone/iPad app by The Sparky.)

- Source: https://appshunter.io/ios/app/circkit-usa/id6809597638 (this page in markdown: same URL + `.md`)
- Developer: [The Sparky](https://appshunter.io/developer/1747077864)
- Category: Utilities, Productivity
- Price: Free with in-app purchases
- Age rating: 4+
- Requires: iOS 17.0 · 50 MB
- Languages: American English, Canadian French
- Released: 2026-11-06
- Data updated: 2026-11-10

## What is CircKit USA?

The essential electrical app for professionals. From motor sizing to voltage drop, get instant results with tools built for electricians, contractors, and engineers, then keep every job organized from first walkthrough to final inspection. Stay compliant with the National Electrical Code.

ADVANCED CALCULATIONS
• Motor circuit and transformer sizing with protection
• Voltage drop and wire ampacity with ambient and bundling derating
• Conduit and box fill
• Service and load calculations by building and occupancy type
• Grounding and bonding conductor sizing and tap rules
• Hazardous location classification
• Arc flash incident energy and PPE category
• PVC expansion, Ohm's Law, and recessed-light spacing

PROFESSIONAL REFERENCE LIBRARY
• NEC reference covering nearly 200 articles and tables
• Conduit and wire trade sizes with drill sizes and metric equivalents
• NEMA configurations and enclosure ratings
• Data pinouts, DIP switch addressing, and phase color codes
• Parallel conductors, vertical supports, burial depths, and strap spacing
• Torque specifications and wire reel estimator

JOB MANAGEMENT
• Track each job's status, priority, due date, contacts, and inspector
• Build panel schedules circuit by circuit, with the load on each phase
• Keep site photos and notes with the job they belong to
• Export job reports, panel schedules, and panel label cards as PDFs with your company logo, name, and phone number
• Set reminders so deadlines and inspections don't slip
• Check the job site's weather forecast and get directions with Apple Maps, Google Maps, or Waze
• Home Screen widgets show a job's status, panels, and latest photos at a glance
• Jobs sync across your devices with iCloud

AI-POWERED ASSISTANCE
• Ask Sparky, your AI electrical assistant, and get answers from the app's own calculators
• Reach Sparky through Siri on Apple Intelligence-compatible devices, even outside the app

BUILT-IN PRODUCTIVITY TOOLS
• Notes accessible anywhere in the app
• Fraction calculator and a unit converter spanning 14 categories
• Code of the Day with optional daily notifications
• Find tools with Spotlight and share results without saving them first
• Works in portrait, landscape, and resizable windows on iPhone and iPad

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:

• Monthly — $2.99 per month
• Yearly — $19.99 per year
• Lifetime — $69.99, a one-time purchase with no subscription

Prices are in U.S. dollars and shown in your local currency elsewhere. Yearly subscribers can upgrade to lifetime access at a reduced price. If you don't subscribe, your jobs and notes stay readable.

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.

CircKit references the 2026 National Electrical Code. Always confirm requirements against the code edition and local amendments adopted by your authority having jurisdiction. NEC and National Electrical Code are registered trademarks of the NFPA, which does not endorse CircKit.

Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
Privacy Policy: https://www.thesparky.work/privacy/

## Pricing and in-app purchases

Base price: Free.

**Subscriptions**

| Subscription | Price | Period |
| --- | --- | --- |
| Yearly | $19.99 | per year |
| Monthly | $2.99 | per month |

**One-time purchases**

| Purchase | Price | Type |
| --- | --- | --- |
| Free Trial | Free | one-time |
| Lifetime Access | $69.99 | one-time |
| Discounted Lifetime | $44.99 | one-time |


## Is CircKit USA safe?

Not enough ratings yet to assess CircKit USA.

## Is CircKit USA legit?

CircKit USA appears legitimate, with a few gaps. The AppsHunter Legitimacy Score for CircKit USA is 70 out of 100 points across 7 verification signals from App Store and developer data.


## Version history (last 2 releases)

### 1.0.1 — 2026-11-08

This update contains minor bug fix and stability improvements.

### 1.0 — 2026-11-06

No release notes.

## More apps by The Sparky

- [Pipe Fill Calculator - Canada](https://appshunter.io/ios/app/pipe-fill-calculator-canada/id6502868718)
- [CircKit](https://appshunter.io/ios/app/circkit/id6612010334)
- [QuikFraction](https://appshunter.io/ios/app/quikfraction/id6736413508)
- [Lumen Layout](https://appshunter.io/ios/app/lumen-layout/id6739475851)
- [SpiceRack](https://appshunter.io/ios/app/spicerack/id6739817552)
- [QuikQuote](https://appshunter.io/ios/app/quikquote/id6743935176)

All apps by The Sparky: https://appshunter.io/developer/1747077864

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-11-10.*