# Voltage Drop Pro vs Resistor Code Calculator Pro

The clearest difference is in-app purchases: Resistor Code Calculator Pro at none against Voltage Drop Pro's 1. Voltage Drop Pro's advantage is iOS requirement (15.1 vs 17.0). On price, ads and device support there is nothing between them.

Both are free to download. Voltage Drop Pro sells 1 one-off in-app purchase. Resistor Code Calculator Pro asks for nothing beyond the download.

## The numbers

| Metric | Voltage Drop Pro | Resistor Code Calculator Pro |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | — |
| Size | 39 MB | 12 MB |
| Requires iOS | **15.1** | 17.0 |
| Devices | iPhone, iPod | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [BRUCE RAY MCCAMPBELL](https://appshunter.io/developer/6772438648) | [Ha Do Thi Thu](https://appshunter.io/developer/1707030622) |

## What reviewers say

### Voltage Drop Pro

[App page](https://appshunter.io/ios/app/voltage-drop-pro-electrician/id6781791471)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Voltage Drop Pro | $2.99 | one-time |


### Resistor Code Calculator Pro

[App page](https://appshunter.io/ios/app/resistor-code-calculator-pro/id6794582814)

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

**In-app purchases:** none


## Frequently asked questions

### Is Voltage Drop Pro free?

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

### Is Resistor Code Calculator Pro free?

Resistor Code Calculator Pro is free to download, with no in-app purchases.

### Do Voltage Drop Pro or Resistor Code Calculator Pro have ads?

Neither Voltage Drop Pro nor Resistor Code Calculator 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.*