E vs FieldVolt Electrical
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
Read full descriptionHide 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.
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.
- 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
Read full descriptionHide 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
Verdict
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
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.
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.
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.
| Parameter | E | FieldVolt Electrical |
|---|---|---|
| Price | $14.99 | Free — better |
| Rating | 5.0 (1 ratings) | 5.0 (1 ratings) |
| Positive reviews | 100.0% of reviews | — |
| Number of ratings | 1 | 1 |
| Update frequency | Every 2 days — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No — better | Yes |
| Monetization | Paid | Freemium — better |
| Devices | iPhone, iPad | iPhone, iPad, iPod — better |
| Requires iOS | 26.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 52 MB | 66 MB |
| Age rating | 4+ | 4+ |
| Developer | Snappy Appz Inc. | MATTHEW DAVID KOVALIK |
Customer experience
E
FieldVolt Electrical
In-app purchases
E
No in-app purchases
FieldVolt Electrical
- FieldVolt Pro$4.991 Month
- FieldVolt Pro$49.991 Year
Questions
Is E free?
Is FieldVolt Electrical free?
Which has better reviews, E or FieldVolt Electrical?
Do E or FieldVolt Electrical have ads?
Which is updated more often, E or FieldVolt Electrical?
Other comparisons















