# VDrop vs Concentric Neutral Calculator

The clearest difference is iOS requirement: VDrop at 10.0 against Concentric Neutral Calculator's 16.6. On price, update cadence, ads and in-app purchases there is nothing between them.

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

VDrop ships an update every 13 months, Concentric Neutral Calculator every 7 months. The most recent releases landed on June 1, 2026 and September 19, 2026 respectively.

## The numbers

| Metric | VDrop | Concentric Neutral Calculator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (3 ratings)](https://appshunter.io/ios/app/vdrop/id1461666751/reviews)** | — |
| Number of ratings | **3** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 7 months** |
| Monetization | Free | — |
| Size | 13 MB | 5 MB |
| Requires iOS | **10.0** | 16.6 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Nebulous LLC](https://appshunter.io/developer/1448637140) | [Southwire Company](https://appshunter.io/developer/440338423) |

## What reviewers say

### VDrop

[App page](https://appshunter.io/ios/app/vdrop/id1461666751)

This utility calculates voltage drop for electrical systems up to 600V. It provides detailed calculation outputs to help users verify results and build confidence in their electrical work. Custom voltage inputs are supported.

**Highlights:** Voltage drop calculations, Supports up to 600V, Custom voltage input, Detailed calculation outputs, User confidence building

**Features:** macOS Compatibility

**In-app purchases:** none


### Concentric Neutral Calculator

[App page](https://appshunter.io/ios/app/concentric-neutral-calculator/id6478878772)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VDrop free?

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

### Is Concentric Neutral Calculator free?

Concentric Neutral Calculator is free to download, with no in-app purchases.

### Do VDrop or Concentric Neutral Calculator have ads?

Neither VDrop nor Concentric Neutral Calculator shows ads.

### Which is updated more often, VDrop or Concentric Neutral Calculator?

VDrop ships an update every 13 months, and Concentric Neutral Calculator every 7 months. Most recently, VDrop was updated on June 1, 2026 and Concentric Neutral Calculator on September 19, 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.*