# Building Wire Selector vs NEMA Guide

The clearest difference is update cadence: NEMA Guide at every 2 days against Building Wire Selector's every 5 months. On price, ads, in-app purchases and device support there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Building Wire Selector ships an update every 5 months, NEMA Guide every 2 days. The most recent releases landed on August 30, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | Building Wire Selector | NEMA Guide |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/building-wire-selector/id6670218338/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 2 days** |
| Monetization | Free | — |
| Size | 6 MB | 23 MB |
| Requires iOS | **16.6** | 17.6 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [Red Zepp LLC](https://appshunter.io/developer/1812216821) |

## What reviewers say

### 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


### NEMA Guide

[App page](https://appshunter.io/ios/app/nema-guide/id6746103301)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Building Wire Selector free?

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

### Is NEMA Guide free?

NEMA Guide is free to download, with no in-app purchases.

### Do Building Wire Selector or NEMA Guide have ads?

Neither Building Wire Selector nor NEMA Guide shows ads.

### Which is updated more often, Building Wire Selector or NEMA Guide?

Building Wire Selector ships an update every 5 months, and NEMA Guide every 2 days. Most recently, Building Wire Selector was updated on August 30, 2026 and NEMA Guide on September 12, 2026.

---

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