# Building Wire Reliability Calc vs VoltRef Pro

The clearest difference is in-app purchases: Building Wire Reliability Calc at none against VoltRef Pro's 2. Building Wire Reliability Calc also leads on device support (3 vs 1) and iOS requirement (15.0 vs 17.0). On price and ads there is nothing between them.

Both are free to download. VoltRef Pro sells 2 in-app purchases, starting at $1.99 per 7 days. Building Wire Reliability Calc asks for nothing beyond the download.

## The numbers

| Metric | Building Wire Reliability Calc | VoltRef Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | — |
| Size | 6 MB | 19 MB |
| Requires iOS | **15.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [Ersel Tarhan](https://appshunter.io/developer/1093545232) |

## 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


### VoltRef Pro

[App page](https://appshunter.io/ios/app/voltref-pro-electrician-code/id6796596602)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly Premium | $1.99 | per 7 days |
| Annual Premium | $19.99 | 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 VoltRef Pro free?

VoltRef Pro is free to download, with in-app purchases available.

### Do Building Wire Reliability Calc or VoltRef Pro have ads?

Neither Building Wire Reliability Calc nor VoltRef Pro shows ads.

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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.*