# Building Wire Reliability Calc vs FieldVolt Electrical

The clearest difference is in-app purchases: Building Wire Reliability Calc at none against FieldVolt Electrical's 2. Building Wire Reliability Calc also leads on update cadence (every 3 weeks vs every 2 months). FieldVolt Electrical's advantage is iOS requirement (13.0 vs 15.0). On price, ads and device support there is nothing between them.

Both are free to download. FieldVolt Electrical sells 2 in-app purchases, starting at $4.99 per month. Building Wire Reliability Calc asks for nothing beyond the download.

Building Wire Reliability Calc ships an update every 3 weeks, FieldVolt Electrical every 2 months. The most recent releases landed on October 11, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | Building Wire Reliability Calc | FieldVolt Electrical |
| --- | --- | --- |
| Price | Free | Free |
| Rating | — | **[5.0 (1 ratings)](https://appshunter.io/ios/app/fieldvolt-electrical/id6761079218/reviews)** |
| Number of ratings | — | **1** |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | **Every 3 weeks** | Every 2 months |
| Monetization | — | Freemium |
| Size | 6 MB | 66 MB |
| Requires iOS | 15.0 | **13.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [MATTHEW DAVID KOVALIK](https://appshunter.io/developer/1887675427) |

## What reviewers say

### Building Wire Reliability Calc

[App page](https://appshunter.io/ios/app/building-wire-reliability-calc/id6747445082)

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is Building Wire Reliability Calc free?

Building Wire Reliability Calc is free to download, with no in-app purchases.

### Is FieldVolt Electrical free?

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

### Do Building Wire Reliability Calc or FieldVolt Electrical have ads?

Neither Building Wire Reliability Calc nor FieldVolt Electrical shows ads.

### Which is updated more often, Building Wire Reliability Calc or FieldVolt Electrical?

Building Wire Reliability Calc ships an update every 3 weeks, and FieldVolt Electrical every 2 months. Most recently, Building Wire Reliability Calc was updated on October 11, 2026 and FieldVolt Electrical on October 12, 2026.

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