# VDrop vs NEC Box & Conduit Calc

The clearest difference is in-app purchases: VDrop at none against NEC Box & Conduit Calc's 1. VDrop also leads on iOS requirement (10.0 vs 17.6). NEC Box & Conduit Calc's advantage is update cadence (every 4 weeks vs every 13 months) and ratings volume (20 vs 4). On price, rating, review sentiment and ads there is nothing between them.

Both are free to download. NEC Box & Conduit Calc sells 1 one-off in-app purchase. VDrop asks for nothing beyond the download.

VDrop holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: NEC Box & Conduit Calc has 20 ratings behind it against 4, so its average is the more settled of the two. Written reviews split almost evenly too, at 100% and 100% positive.

VDrop ships an update every 13 months, NEC Box & Conduit Calc every 4 weeks. The most recent releases landed on November 3, 2026 and November 5, 2026 respectively.

## The numbers

| Metric | VDrop | NEC Box & Conduit Calc |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (4 ratings)](https://appshunter.io/ios/app/vdrop/id1461666751/reviews)** | [4.8 (20 ratings)](https://appshunter.io/ios/app/nec-box-and-conduit-calc/id6755513987/reviews) |
| Number of ratings | 4 | **20** |
| Positive reviews | 100.0% of reviews | 100.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 13 months | **Every 4 weeks** |
| Monetization | **Free** | Free with in-app purchases |
| Size | 13 MB | 40 MB |
| Requires iOS | **10.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Nebulous LLC](https://appshunter.io/developer/1448637140) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## 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


### NEC Box & Conduit Calc

[App page](https://appshunter.io/ios/app/nec-box-and-conduit-calc/id6755513987)

Calculate electrical box and conduit fill accurately according to the NEC. This app provides instant, reliable calculations for electricians, contractors, and students, saving time on job sites. It offers support for various box and conduit types, conductor sizes, and includes wire volume data.

**Highlights:** Box fill calculations, Conduit fill calculations, Wire volume data, Supports multiple conduit types, Supports device counts and clamps, Offline functionality, Clean, simple interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| NEC Box Conduit Calc Pro | $4.99 | one-time |


## Frequently asked questions

### Is VDrop free?

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

### Is NEC Box & Conduit Calc free?

NEC Box & Conduit Calc is free to download, with in-app purchases available.

### Which has better reviews, VDrop or NEC Box & Conduit Calc?

VDrop is rated higher. VDrop averages 5.0 out of 5 from 4 ratings, while NEC Box & Conduit Calc averages 4.8 from 20 ratings.

### Do VDrop or NEC Box & Conduit Calc have ads?

Neither VDrop nor NEC Box & Conduit Calc shows ads.

### Which is updated more often, VDrop or NEC Box & Conduit Calc?

VDrop ships an update every 13 months, and NEC Box & Conduit Calc every 4 weeks. Most recently, VDrop was updated on November 3, 2026 and NEC Box & Conduit Calc on November 5, 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.*