# VDrop vs Power Conversion Calc

The clearest difference is update cadence: Power Conversion Calc at every 3 months against VDrop's every 13 months. VDrop's advantage is iOS requirement (10.0 vs 16.0). On price, ads, in-app purchases and device support 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, Power Conversion Calc every 3 months. The most recent releases landed on June 1, 2026 and September 12, 2026 respectively.

## The numbers

| Metric | VDrop | Power Conversion Calc |
| --- | --- | --- |
| 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 3 months** |
| Monetization | Free | — |
| Size | 13 MB | 6 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| 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


### Power Conversion Calc

[App page](https://appshunter.io/ios/app/power-conversion-calc/id6483929959)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is VDrop free?

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

### Is Power Conversion Calc free?

Power Conversion Calc is free to download, with no in-app purchases.

### Do VDrop or Power Conversion Calc have ads?

Neither VDrop nor Power Conversion Calc shows ads.

### Which is updated more often, VDrop or Power Conversion Calc?

VDrop ships an update every 13 months, and Power Conversion Calc every 3 months. Most recently, VDrop was updated on June 1, 2026 and Power Conversion Calc on September 12, 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.*