Comparison

E vs FieldVolt Electrical

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

E

This app provides electricians and engineers with instant, code-compliant calculations for wire sizing, conduit capacities, fusing, and bonding based on the 2026 National Electrical Code. It offers advanced tools for motors, transformers, voltage drop, and box fill, along with on-site utilities like panel legends and torque settings.

Highlights
  • NEC 2026 compliant calculations
  • Wire sizing and ampacity
  • Conduit fill and expansion
  • Motor and transformer calculations
  • Voltage drop and box fill
  • Panel legends and torque settings
  • Integrated unit converter and Ohm's Law
Features
Read full description

E-Calc USA 2026: The Ultimate NEC Companion Stop flipping through code books and start calculating with precision. E-Calc USA 2026 is the definitive electrical resource for professionals who demand more than just simple formulas. Designed specifically for electricians, engineers, and contractors, this app provides instant, accurate results based on the 2026 National Electrical Code (NEC). While other apps stop at basic math, E-Calc USA handles the heavy lifting—delivering code-compliant wire sizing, conduit capacities, fusing, and bonding requirements in seconds. Professional Features for the Field Advanced Motor & Transformer Tools Motor Loads: Get instant results for maximum overcurrent, overload protection, minimum wire size, conduit size, and bond wire requirements. Transformers: Calculate FLA, pipe size, fuse/breaker ratings, and bond sizing for both primary and secondary systems. Precision Wire & Conduit Sizing Ampacity & Derating: Calculate allowable ampacity for any wire type or complex derating scenario. Conduit Fill: Quickly find the maximum number of similar-sized wires for any given pipe. Expansion & Spacing: Calculate linear expansion for conduits and required strap spacing. Complex Calculations Made Simple Voltage Drop: Solve complicated runs easily. Get results for percentage drop, maximum run lengths, and wire sizing, with full support for derating. Box Fill: Accurate calculations in both mL and cubic inches. On-Site Utilities & Reference Panel Legends: Create custom, professional panel legends and print them directly to scale. Torque Settings: Access recommended torque settings for a wide variety of lugs and terminations. NEMA Reference: Quickly find NEMA codes and receptacle specifications. Built for Your Workflow Save & Share: Every calculation is saved and can be printed or shared with your team or inspectors. Universal Access: Buy once and run E-Calc USA on your iPhone, iPad, and Mac. Integrated Tools: Includes a comprehensive unit converter, Ohm’s Law calculator, and voltage unbalance tool. Whether you are in the office designing a system or on-site during an inspection, E-Calc USA ensures you have the power of the National Electrical Code right in your pocket. Download E-Calc USA today and work smarter.

About

FieldVolt Electrical

This app assists electricians with complex calculations for pipe bending, conduit fill, ampacity, voltage drop, and box fill. It also offers a professional subscription for expert electrical advice and troubleshooting.

Highlights
  • Pipe bending calculations (offsets, saddles)
  • Conduit fill calculations (NEC Table 1)
  • Ampacity and wire sizing
  • Voltage drop calculations
  • Box fill calculations (NEC 314.16)
  • Expert electrical advice subscription
Features
Read full description

Built by a licensed electrician for work in the field. PIPE BENDING Offsets, 3-bend saddles, 4-bend saddles, rolled offsets, back-to-back 90s, and parallel offsets. Mark placement calculated from the working end. Shrink, gain, spacing — all of it. CONDUIT FILL NEC Table 1 calculations for mixed wire fills. Add conductors, get fill percentage. AMPACITY Wire sizing and derating for ambient temperature, number of current-carrying conductors, and conduit type. VOLTAGE DROP Feeder and branch circuit voltage drop for single-phase and three-phase systems. BOX FILL NEC 314.16 calculations for device, conductor, clamp, and support fitting fill. FIELDVOLT PRO Ask electrical questions, get straight answers. Code interpretation, troubleshooting, load calc logic — the kind of thinking you'd get from someone who's been in the trade for 30 years. 5 free sessions included. Pro subscription available at $4.99/month or $50/year. Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Screenshots

E4 screens
FieldVolt Electrical4 screens

Verdict

The call

The clearest difference is price: FieldVolt Electrical at Free against E's $14.99. FieldVolt Electrical also leads on iOS requirement (13.0 vs 26.0). E's advantage is in-app purchases (none vs 2) and update cadence (every 2 days vs every 2 months). On rating, ratings volume, ads and device support there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

FieldVolt Electrical is free to download; E costs $14.99 up front. FieldVolt Electrical sells 2 in-app purchases, starting at $4.99 per month. E asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

On the App Store both sit at effectively the same score — 5.0 for E against 5.0 for FieldVolt Electrical. Both are backed by a comparable volume of ratings — 1 and 1 respectively.

UpkeepUpdate frequency

E ships an update every 2 days, FieldVolt Electrical every 2 months. The most recent releases landed on October 22, 2026 and October 12, 2026 respectively.

Scorecard5 real differences · 5 level
E versus FieldVolt Electrical: the parameters behind the verdict, then further details
ParameterEFieldVolt Electrical
Price$14.99Free — better
Rating5.0 (1 ratings)5.0 (1 ratings)
Positive reviews100.0% of reviews—
Number of ratings11
Update frequencyEvery 2 days — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
MonetizationPaidFreemium — better
DevicesiPhone, iPadiPhone, iPad, iPod — better
Requires iOS26.013.0 — better
Further details — not scored
Size52 MB66 MB
Age rating4+4+
DeveloperSnappy Appz Inc.MATTHEW DAVID KOVALIK

Customer experience

E

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%
Written reviews1 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

FieldVolt Electrical

All ratings1 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

E

No in-app purchases

2 purchases

FieldVolt Electrical

Subscriptions2
  • FieldVolt Pro$4.991 Month
  • FieldVolt Pro$49.991 Year

Questions

Is E free?
E costs $14.99, with no in-app purchases.
Is FieldVolt Electrical free?
FieldVolt Electrical is free to download, with in-app purchases available.
Which has better reviews, E or FieldVolt Electrical?
E and FieldVolt Electrical are both rated 5.0 out of 5 on the App Store, from 1 and 1 ratings respectively.
Do E or FieldVolt Electrical have ads?
Neither E nor FieldVolt Electrical shows ads.
Which is updated more often, E or FieldVolt Electrical?
E ships an update every 2 days, and FieldVolt Electrical every 2 months. Most recently, E was updated on October 22, 2026 and FieldVolt Electrical on October 12, 2026.

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