# FieldVolt Electrical vs Transformer Calc NEC

The clearest difference is price: FieldVolt Electrical at Free against Transformer Calc NEC's $0.99. Transformer Calc NEC's advantage is update cadence (every 3 days vs every 2 months). On ads, in-app purchases, device support and iOS requirement there is nothing between them.

FieldVolt Electrical is free to download; Transformer Calc NEC costs $0.99 up front. FieldVolt Electrical sells 2 in-app purchases, starting at $4.99 per month and Transformer Calc NEC sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

FieldVolt Electrical ships an update every 2 months, Transformer Calc NEC every 3 days. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | FieldVolt Electrical | Transformer Calc NEC |
| --- | --- | --- |
| Price | **Free** | $0.99 |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fieldvolt-electrical/id6761079218/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 days** |
| Monetization | Freemium | — |
| Size | 66 MB | 32 MB |
| Requires iOS | 13.0 | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 17+ |
| Developer | [MATTHEW DAVID KOVALIK](https://appshunter.io/developer/1887675427) | [Rizvan Adzhoian](https://appshunter.io/developer/1891746079) |

## What reviewers say

### FieldVolt Electrical

[App page](https://appshunter.io/ios/app/fieldvolt-electrical/id6761079218)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| FieldVolt Pro | $4.99 | per month |
| FieldVolt Pro | $49.99 | per year |


### Transformer Calc NEC

[App page](https://appshunter.io/ios/app/transformer-calc-nec/id6763311943)

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Unlock | $2.99 | one-time |


## Frequently asked questions

### Is FieldVolt Electrical free?

FieldVolt Electrical is free to download, with in-app purchases available.

### Is Transformer Calc NEC free?

Transformer Calc NEC costs $0.99, and also offers in-app purchases.

### Do FieldVolt Electrical or Transformer Calc NEC have ads?

Neither FieldVolt Electrical nor Transformer Calc NEC shows ads.

### Which is updated more often, FieldVolt Electrical or Transformer Calc NEC?

FieldVolt Electrical ships an update every 2 months, and Transformer Calc NEC every 3 days. Most recently, FieldVolt Electrical was updated on October 31, 2026 and Transformer Calc NEC on October 28, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*