# Electrical Calculations vs Severe Service

The clearest difference is in-app purchases: Severe Service at none against Electrical Calculations's 3. Severe Service also leads on ads (none vs shown) and iOS requirement (13.2 vs 15.0). Electrical Calculations's advantage is ratings volume (126 vs 7). On price, rating, update cadence 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. Severe Service asks for nothing beyond the download.

On the App Store both sit at effectively the same score — 4.6 for Electrical Calculations against 4.7 for Severe Service. That said, the two scores are not equally well evidenced: Electrical Calculations has 126 ratings behind it against 7, so its average is the more settled of the two.

Electrical Calculations ships an update every 3 weeks, Severe Service monthly. The most recent releases landed on September 28, 2026 and September 16, 2026 respectively.

## The numbers

| Metric | Electrical Calculations | Severe Service |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [4.6 (126 ratings)](https://appshunter.io/ios/app/electrical-calculations/id993232048/reviews) | **[4.7 (7 ratings)](https://appshunter.io/ios/app/severe-service/id1436753584/reviews)** |
| Number of ratings | **126** | 7 |
| Positive reviews | 86.7% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Monthly |
| Monetization | Free with in-app purchases | **Free** |
| Size | 56 MB | 26 MB |
| Requires iOS | 15.0 | **13.2** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Egal Net di Ettore Gallina](https://appshunter.io/developer/993232047) | [Emerson Process Management](https://appshunter.io/developer/561985742) |

## 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 |


### Severe Service

[App page](https://appshunter.io/ios/app/severe-service/id1436753584)

This app helps users perform initial sizing for control valves, diagnose issues by selecting symptoms, and explore severe service applications across various industries. It also provides access to a technical library with videos and PDFs, a product catalog, and a contact feature for expert assistance.

**Highlights:** Control valve sizing tool, Issue diagnosis by symptom, Industry application explorer, Technical library with videos and PDFs, Fisher product catalog, Keyword search functionality, Direct contact with experts

**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 Severe Service free?

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

### Which has better reviews, Electrical Calculations or Severe Service?

Severe Service is rated higher. Electrical Calculations averages 4.6 out of 5 from 126 ratings, while Severe Service averages 4.7 from 7 ratings.

### Do Electrical Calculations or Severe Service have ads?

Electrical Calculations shows ads; Severe Service does not.

### Which is updated more often, Electrical Calculations or Severe Service?

Electrical Calculations ships an update every 3 weeks, and Severe Service monthly. Most recently, Electrical Calculations was updated on September 28, 2026 and Severe Service on September 16, 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.*