# Electrical Calculations vs IndexOS

The clearest difference is ads: IndexOS at none against Electrical Calculations's shown. On price, update cadence, in-app purchases 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 and IndexOS sells 2 in-app purchases, starting at $3.99 per month. Whichever you choose, the download price is not the number that matters.

Electrical Calculations ships an update every 3 weeks, IndexOS every 4 weeks. The most recent releases landed on October 15, 2026 and October 8, 2026 respectively.

## The numbers

| Metric | Electrical Calculations | IndexOS |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.6 (128 ratings)](https://appshunter.io/ios/app/electrical-calculations/id993232048/reviews)** | — |
| Number of ratings | **128** | — |
| Positive reviews | 86.7% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | Yes | **No** |
| Update frequency | **Every 3 weeks** | Every 4 weeks |
| Monetization | Free with in-app purchases | — |
| Size | 56 MB | 155 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Egal Net di Ettore Gallina](https://appshunter.io/developer/993232047) | [Alessandro Silvio Celotto](https://appshunter.io/developer/6781339350) |

## 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 |


### IndexOS

[App page](https://appshunter.io/ios/app/indexos/id6781729474)

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| IndexOS - Piano Mensile | $3.99 | per month |
| IndexOS - Piano Annuale | $44.99 | per year |


## Frequently asked questions

### Is Electrical Calculations free?

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

### Is IndexOS free?

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

### Do Electrical Calculations or IndexOS have ads?

Electrical Calculations shows ads; IndexOS does not.

### Which is updated more often, Electrical Calculations or IndexOS?

Electrical Calculations ships an update every 3 weeks, and IndexOS every 4 weeks. Most recently, Electrical Calculations was updated on October 15, 2026 and IndexOS on October 8, 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.*