# Voltage Drop Calculator. vs Building Wire Selector

The clearest difference is review sentiment: Building Wire Selector at 100% against Voltage Drop Calculator.'s 33%. Building Wire Selector also leads on in-app purchases (none vs 1) and ads (none vs shown). Voltage Drop Calculator.'s advantage is ratings volume (414 vs 2). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. Voltage Drop Calculator. sells 1 one-off in-app purchase. Building Wire Selector asks for nothing beyond the download.

Building Wire Selector holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Voltage Drop Calculator. has 414 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 33% of Voltage Drop Calculator.'s written reviews are positive against 100% of Building Wire Selector's.

Voltage Drop Calculator. ships an update every 3 months, Building Wire Selector every 2 months. The most recent releases landed on October 28, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Voltage Drop Calculator. | Building Wire Selector |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (414 ratings)](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/building-wire-selector/id6670218338/reviews)** |
| Number of ratings | **414** | 2 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 3 months | **Every 2 months** |
| Monetization | Free with in-app purchases | **Free** |
| Size | 51 MB | 6 MB |
| Requires iOS | 17.6 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Southwire Company](https://appshunter.io/developer/440338423) |

## What reviewers say

### Voltage Drop Calculator.

[App page](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064)

Calculate voltage drop and wire size using both NEC and IEC standards. Supports various load types, conductor materials, and system configurations. Generates detailed reports for electricians, engineers, and contractors.

**Highlights:** NEC and IEC dual standards, Voltage drop and wire sizing calculations, Support for continuous load and corrections, Copper or Aluminum conductor options, Single-phase and three-phase systems, Automatic compliance checks, PDF report generation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Pro | $4.99 | one-time |


### Building Wire Selector

[App page](https://appshunter.io/ios/app/building-wire-selector/id6670218338)

This tool helps determine the correct conductor size and wire type for electrical installations. It adheres to the National Electrical Code® wiring methods, ensuring compliance and safety.

**Highlights:** Conductor size determination, Wire and cable type selection, National Electrical Code compliance, Electrical installation guidance

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Voltage Drop Calculator. free?

Voltage Drop Calculator. is free to download, with in-app purchases available.

### Is Building Wire Selector free?

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

### Which has better reviews, Voltage Drop Calculator. or Building Wire Selector?

Building Wire Selector is rated higher. Voltage Drop Calculator. averages 4.6 out of 5 from 414 ratings, while Building Wire Selector averages 5.0 from 2 ratings.

### Do Voltage Drop Calculator. or Building Wire Selector have ads?

Voltage Drop Calculator. shows ads; Building Wire Selector does not.

### Which is updated more often, Voltage Drop Calculator. or Building Wire Selector?

Voltage Drop Calculator. ships an update every 3 months, and Building Wire Selector every 2 months. Most recently, Voltage Drop Calculator. was updated on October 28, 2026 and Building Wire Selector on October 24, 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.*