# Electrical Calculations vs Machine Defender

The clearest difference is in-app purchases: Machine Defender at none against Electrical Calculations's 3. Machine Defender also leads on ads (none vs shown) and rating (5.0 vs 4.6). Electrical Calculations's advantage is update cadence (every 3 weeks vs every 8 months) and ratings volume (126 vs 1). On price and device support there is nothing between them.

Both are free to download. Electrical Calculations sells 3 in-app purchases, starting at $3.99 per 3 months. Machine Defender asks for nothing beyond the download.

Machine Defender holds the better App Store score, 5.0 against 4.6. That said, the two scores are not equally well evidenced: Electrical Calculations has 126 ratings behind it against 1, so its average is the more settled of the two.

Electrical Calculations ships an update every 3 weeks, Machine Defender every 8 months. The most recent releases landed on October 8, 2026 and September 28, 2026 respectively.

## The numbers

| Metric | Electrical Calculations | Machine Defender |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (126 ratings)](https://appshunter.io/ios/app/electrical-calculations/id993232048/reviews) | **[5.0 (1 ratings)](https://appshunter.io/ios/app/machine-defender/id1496754747/reviews)** |
| Number of ratings | **126** | 1 |
| Positive reviews | 86.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 8 months |
| Monetization | Free with in-app purchases | **Free** |
| Size | 56 MB | 274 MB |
| Requires iOS | 15.0 | **12.1** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Egal Net di Ettore Gallina](https://appshunter.io/developer/993232047) | [ACOEM Group](https://appshunter.io/developer/1495816959) |

## What reviewers say

### Electrical Calculations

[App page](https://appshunter.io/ios/app/electrical-calculations/id993232048)

This app provides a comprehensive suite of electrical calculations for professionals. It supports various international standards and offers detailed reports in PDF format. The tool covers wiring, power, motor, and electronic calculations, along with extensive conversion tables and resources.

**Highlights:** Wire size and voltage drop calculations, Power, current, and resistance calculations, Motor performance and connection diagrams, Electronic component calculations, Extensive unit conversions, PDF report generation, Support for IEC, CEI, NEC, CEC standards

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| PRO Version (3 months) | $3.99 | per 3 months |
| PRO Version (1 year) | $7.49 | per year |
| PRO Version (Lifetime) | $89.99 | one-time |


### Machine Defender

[App page](https://appshunter.io/ios/app/machine-defender/id1496754747)

This app, used with a wireless vibration sensor, collects and analyzes vibration data from industrial rotating machinery. It automatically detects faults in components like motors and pumps, providing diagnostic reports and maintenance recommendations.

**Highlights:** Wireless vibration data collection, Automatic fault detection with AI, Machine health assessment, Maintenance recommendations, Report storage and sharing, Cloud platform connectivity

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Electrical Calculations free?

Electrical Calculations is free to download, with in-app purchases available.

### Is Machine Defender free?

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

### Which has better reviews, Electrical Calculations or Machine Defender?

Machine Defender is rated higher. Electrical Calculations averages 4.6 out of 5 from 126 ratings, while Machine Defender averages 5.0 from 1 ratings.

### Do Electrical Calculations or Machine Defender have ads?

Electrical Calculations shows ads; Machine Defender does not.

### Which is updated more often, Electrical Calculations or Machine Defender?

Electrical Calculations ships an update every 3 weeks, and Machine Defender every 8 months. Most recently, Electrical Calculations was updated on October 8, 2026 and Machine Defender on September 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.*