# Box Fill 2 vs Building Wire Selector

The clearest difference is review sentiment: Building Wire Selector at 100% against Box Fill 2's 33%. Building Wire Selector also leads on price (Free vs $3.99) and rating (5.0 vs 3.3). Box Fill 2's advantage is update cadence (every 5 weeks vs every 5 months). On ratings volume, ads, in-app purchases and device support there is nothing between them.

Building Wire Selector is free to download; Box Fill 2 costs $3.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Building Wire Selector holds the better App Store score, 5.0 against 3.3. Both are backed by a comparable volume of ratings — 3 and 2 respectively. Written reviews point the same way: 33% of Box Fill 2's written reviews are positive against 100% of Building Wire Selector's.

Box Fill 2 ships an update every 5 weeks, Building Wire Selector every 5 months. The most recent releases landed on August 27, 2026 and August 30, 2026 respectively.

## The numbers

| Metric | Box Fill 2 | Building Wire Selector |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | [3.3 (3 ratings)](https://appshunter.io/ios/app/box-fill-2/id1589765411/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/building-wire-selector/id6670218338/reviews)** |
| Number of ratings | **3** | 2 |
| Positive reviews | 33.3% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 5 weeks** | Every 5 months |
| Monetization | Paid | **Free** |
| Size | 19 MB | 6 MB |
| Requires iOS | 26.0 | **16.6** |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) | [Southwire Company](https://appshunter.io/developer/440338423) |

## What reviewers say

### Box Fill 2

[App page](https://appshunter.io/ios/app/box-fill-2/id1589765411)

This utility app helps electricians and contractors perform precise electrical box fill calculations according to the latest codes. It also includes a comprehensive construction calculator for dimensional math, area, volume, and right-angle solutions.

**Highlights:** Electrical box fill calculations, Construction calculator, Dimensional math (feet-inches-fractions, metric), Area and volume calculations, Right-angle solutions, Shareable calculation reports, iCloud sync across devices

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

**In-app purchases:** none


### 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 Box Fill 2 free?

Box Fill 2 costs $3.99, with no in-app purchases.

### Is Building Wire Selector free?

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

### Which has better reviews, Box Fill 2 or Building Wire Selector?

Building Wire Selector is rated higher. Box Fill 2 averages 3.3 out of 5 from 3 ratings, while Building Wire Selector averages 5.0 from 2 ratings.

### Do Box Fill 2 or Building Wire Selector have ads?

Neither Box Fill 2 nor Building Wire Selector shows ads.

### Which is updated more often, Box Fill 2 or Building Wire Selector?

Box Fill 2 ships an update every 5 weeks, and Building Wire Selector every 5 months. Most recently, Box Fill 2 was updated on August 27, 2026 and Building Wire Selector on August 30, 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.*