# Journeyman Field Pro — Electrical & Low Voltage Calc

> Electrical & Low Voltage Calc (iPhone/iPad app by Billy Jackson.)

- Source: https://appshunter.io/ios/app/journeyman-field-pro/id6792427466 (this page in markdown: same URL + `.md`)
- Developer: [Billy Jackson](https://appshunter.io/developer/6792427468)
- Category: Utilities, Productivity
- Price: $9.99
- Age rating: 4+
- Requires: iOS 15.1 · 26 MB
- Languages: American English
- Released: 2026-08-17
- Data updated: 2026-09-02
- User reviews in markdown: https://appshunter.io/ios/app/journeyman-field-pro/id6792427466/reviews.md

## What is Journeyman Field Pro?

Journeyman Field Pro puts electrical and low-voltage calculations, a plain-language code assistant, and field guides in one app — fast, accurate, and offline on the job.

ELECTRICAL — 9 CALCULATORS
- Voltage Drop (single & 3-phase, copper/aluminum)
- Wire Sizing (ampacity check with bundle derating)
- Conduit Fill (EMT, IMC, RMC, PVC)
- Ohm's Law (solve V, I, R, or P)
- Load Calculator (service sizing, 125% rule)
- Conduit Bending (offsets, saddles, 3-point, 4-point)
- Box Fill (NEC 314.16 volume method)
- Motor FLA (conductor & OCPD sizing)
- NEC Quick Reference

LOW VOLTAGE — 9 CALCULATORS
- Fire Alarm Voltage Drop (NFPA 72 NAC)
- Camera Power / Voltage Drop
- PoE Budget (IEEE 802.3 af/at/bt)
- DC Wire Sizing
- Battery Backup (standby + derate)
- Strobe / Candela Spacing
- Cable Pull Tension
- Speaker Line Loss (70V + low-impedance)
- LV Quick Reference

ASK THE CODE — AI ASSISTANT
Ask a question in plain English and get an answer with the exact NEC or NFPA 72 article reference. Pick your code edition. No more flipping through a codebook on a ladder.

FIELD GUIDES
Short, plain-language how-to guides written for working techs — voltage drop, wire sizing, motor circuits, PoE budgeting, grounding vs bonding, strobe placement, and more. Each one ends with the key takeaways.

SAVE & ORGANIZE
Save any result or code answer and pull it back up later — all stored on your device, available offline. Star your go-to calculators to pin them to the top.

BUILT FOR IPHONE AND IPAD
A layout that makes real use of the screen, whether you're on a phone in your pouch or an iPad in the truck.

No account, no login, no sign-up. The calculators and guides work with no internet connection at all.


## Version history (last 3 releases)

### 1.0.2 — 2026-08-26

Fixes "Ask the Code" connectivity so the AI code assistant works reliably again.

### 1.0.1 — 2026-08-25

New app icon. Plus native iPad support, a Saved tab with favorites, save on every calculator and code answer, and Field Guides.

### 1.0 — 2026-08-17

No release notes.

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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 2026-09-02.*