Voltly
The whole drawer of job-site calculators, in one tool that works in the dark.
Voltly is the electrician's field calculator and offline NEC reference. Bend conduit, size wire, check voltage drop, box fill, conduit fill, ampacity and motor loads — with clean diagrams, a glove-friendly keypad, and the code article cited on every answer. Fully offline, no ads, built for the truck and the panel.
Voltly
productivity
The whole drawer of job-site calculators, in one tool that works in the dark
What you get
Voltly was built for exactly this.
The core features that make Voltly different from the generic alternatives.
Conduit bending suite — offset, 90° stub-up and saddle — with clean labeled diagrams, multipliers, shrink and take-up.
Voltage drop, free — single- and three-phase, copper or aluminum, by AWG, length and load.
Wire ampacity from NEC Table 310.16 with temperature correction and conductor-fill adjustment.
Box fill (314.16) and conduit fill (Chapter 9) so you size the raceway and the box right the first time.
Offline NEC reference — the article number cited on every answer, in Voltly's own plain-language summaries.
Saved jobs and recent calcs, a glove-friendly numeric keypad, haptic confirm, dark and light — all on-device.
A note from the studio
“I kept watching electricians thumb between four paid apps and a dog-eared pocket reference to size one feeder. Voltly is the tool I wished they had: fast, offline, honest about where each number comes from — and a disclaimer that it never replaces the current code or a licensed pro.”
How it works
Three steps. No account. No tracking.
01
Download once
Install Voltly from the App Store when the waitlist opens. No account setup — it works the moment you open it.
02
Use for ninety seconds a day
The product is designed so the useful thing takes less than two minutes. Anything longer and you stop. We know.
03
Notice what changes
Patterns surface after two to three weeks. The data is yours alone — no cloud, no report to anyone.
Not shipped yet
Notify me when Voltly ships.
It'll launch at $9.99 one-time unlock (Voltly Pro, yours forever). Free tier: ohm's law and voltage drop are always free · also offered annual $49.99/yr or $6.99/mo with a 7-day trial.
One email when it lands on the App Store. No drip sequence.
No spam. No tracking. Email only — unsubscribe with one click.
From the journal
Notes on the practice.
- 01
The Calculation Habit That Separates a Clean Job From a Callback
A field workflow for electricians: when to run the numbers, what to calculate before you leave the truck, and how a calculation habit prevents costly callbacks.
2026-06-11
8 min read
- 02
EMT, IMC, or Rigid: Choosing the Right Conduit
A decision guide to EMT vs IMC vs rigid metal conduit: how wall thickness, connection method, and location decide which raceway belongs on your job.
2026-06-07
8 min read
- 03
Sizing a Feeder to a Detached Garage 150 Feet Away
Walk through feeding a detached sub-panel: how ampacity, voltage drop over distance, and the four-wire grounding rule all decide the conductor for a long feeder.
2026-06-03
9 min read
- 04
Reading the Ampacity Table: A Beginner's Guide to 310.16
A plain-English primer on reading NEC Table 310.16 ampacity: what the three temperature columns mean and the termination rule that decides which one you actually use.
2026-05-29
8 min read
- 05
The Box Fill Calculation Everyone Gets Slightly Wrong
Box fill seems simple until you count it. Here's how a NEC 314.16 box fill calculation actually works, and the counting mistakes that lead to overfilled boxes.
2026-05-24
8 min read
The dispatch
A dispatch from the studio.
One short letter every few weeks. What we launched, what we cut, what we learned. No tracking pixels. Unsubscribe in one click.
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