# VFD Cable Sizing Calc vs VoltRef Pro

The clearest difference is in-app purchases: VFD Cable Sizing Calc at none against VoltRef Pro's 2. On price, ads, device support and iOS requirement there is nothing between them.

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

## The numbers

| Metric | VFD Cable Sizing Calc | VoltRef Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 5 months | — |
| Size | 5 MB | 19 MB |
| Requires iOS | **16.5** | 17.0 |
| Devices | **iPhone, iPad** | iPhone |
| Age rating | 17+ | 4+ |
| Developer | [Southwire Company](https://appshunter.io/developer/440338423) | [Ersel Tarhan](https://appshunter.io/developer/1093545232) |

## What reviewers say

### VFD Cable Sizing Calc

[App page](https://appshunter.io/ios/app/vfd-cable-sizing-calc/id6452802915)

**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 VFD Cable Sizing Calc free?

VFD Cable Sizing 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 VFD Cable Sizing Calc or VoltRef Pro have ads?

Neither VFD Cable Sizing 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.*