# Fault Current Calculator vs Voltage Drop Calculator.

The clearest difference is rating: Voltage Drop Calculator. at 4.6 against Fault Current Calculator's 3.0. Voltage Drop Calculator. also leads on review sentiment (33% vs 0%) and ratings volume (413 vs 27). Fault Current Calculator's advantage is ads (none vs shown) and iOS requirement (14.0 vs 17.6). On price, update cadence, in-app purchases and monetization model there is nothing between them.

Both are free to download. Fault Current Calculator sells 2 in-app purchases, starting at $4.99 per month and Voltage Drop Calculator. sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Voltage Drop Calculator. holds the better App Store score, 4.6 against 3.0. That said, the two scores are not equally well evidenced: Voltage Drop Calculator. has 413 ratings behind it against 27, so its average is the more settled of the two. Written reviews point the same way: 0% of Fault Current Calculator's written reviews are positive against 33% of Voltage Drop Calculator.'s.

Fault Current Calculator ships an update every 4 months, Voltage Drop Calculator. every 3 months. Both last shipped on October 23, 2026.

## The numbers

| Metric | Fault Current Calculator | Voltage Drop Calculator. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [3.0 (27 ratings)](https://appshunter.io/ios/app/fault-current-calculator/id647477910/reviews) | **[4.6 (413 ratings)](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064/reviews)** |
| Number of ratings | 27 | **413** |
| Positive reviews | 0.0% of reviews | **33.3% of reviews** |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 4 months | **Every 3 months** |
| Monetization | Freemium | Free with in-app purchases |
| Size | 25 MB | 51 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 17+ | 4+ |
| Developer | [Cooper Bussmann, LLC](https://appshunter.io/developer/609315535) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## What reviewers say

### Fault Current Calculator

[App page](https://appshunter.io/ios/app/fault-current-calculator/id647477910)

This tool helps contractors, engineers, and electricians quickly calculate available fault current on single and three-phase electrical systems. It also assists in sizing fuses and conductors for various circuits and can generate labels for service equipment.

**Highlights:** Calculate available fault current, Size fuses and conductors, Generate service equipment labels, Single and three-phase system support, NEC® 110.24 compliance

**Features:** macOS Compatibility

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Pro Monthly Subscription | $4.99 | per month |
| Pro Annual Subscription | $39.99 | per year |


### Voltage Drop Calculator.

[App page](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064)

Calculate voltage drop and wire size using both NEC and IEC standards. Supports various load types, conductor materials, and system configurations. Generates detailed reports for electricians, engineers, and contractors.

**Highlights:** NEC and IEC dual standards, Voltage drop and wire sizing calculations, Support for continuous load and corrections, Copper or Aluminum conductor options, Single-phase and three-phase systems, Automatic compliance checks, PDF report generation

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Pro | $4.99 | one-time |


## Frequently asked questions

### Is Fault Current Calculator free?

Fault Current Calculator is free to download, with in-app purchases available.

### Is Voltage Drop Calculator. free?

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

### Which has better reviews, Fault Current Calculator or Voltage Drop Calculator.?

Voltage Drop Calculator. is rated higher. Fault Current Calculator averages 3.0 out of 5 from 27 ratings, while Voltage Drop Calculator. averages 4.6 from 413 ratings.

### Do Fault Current Calculator or Voltage Drop Calculator. have ads?

Voltage Drop Calculator. shows ads; Fault Current Calculator does not.

### Which is updated more often, Fault Current Calculator or Voltage Drop Calculator.?

Fault Current Calculator ships an update every 4 months, and Voltage Drop Calculator. every 3 months. Most recently, Fault Current Calculator was updated on October 23, 2026 and Voltage Drop Calculator. on October 23, 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.*