# Voltage Drop Calculator. vs SMART HSE

The clearest difference is in-app purchases: SMART HSE at none against Voltage Drop Calculator.'s 1. SMART HSE also leads on ads (none vs shown) and iOS requirement (13.0 vs 17.6). On price, update cadence and device support there is nothing between them.

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

Voltage Drop Calculator. ships an update every 3 months, SMART HSE every 4 months. The most recent releases landed on October 31, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Voltage Drop Calculator. | SMART HSE |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (413 ratings)](https://appshunter.io/ios/app/voltage-drop-calculator/id1203737064/reviews)** | — |
| Number of ratings | **413** | — |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 51 MB | 87 MB |
| Requires iOS | 17.6 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Umbrella (Shenzhen) Intelligent Technology Co., Ltd](https://appshunter.io/developer/1749467709) |

## What reviewers say

### 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 |


### SMART HSE

[App page](https://appshunter.io/ios/app/smart-hse/id6741672884)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Voltage Drop Calculator. free?

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

### Is SMART HSE free?

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

### Do Voltage Drop Calculator. or SMART HSE have ads?

Voltage Drop Calculator. shows ads; SMART HSE does not.

### Which is updated more often, Voltage Drop Calculator. or SMART HSE?

Voltage Drop Calculator. ships an update every 3 months, and SMART HSE every 4 months. Most recently, Voltage Drop Calculator. was updated on October 31, 2026 and SMART HSE on October 28, 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.*