# Electrical calculation vs Notopium

The clearest difference is in-app purchases: Notopium at none against Electrical calculation's 1. Electrical calculation's advantage is iOS requirement (12.0 vs 15.0). On price, update cadence, ads and device support there is nothing between them.

Both are free to download. Electrical calculation sells 1 one-off in-app purchase. Notopium asks for nothing beyond the download.

Electrical calculation ships an update every 3 months, Notopium every 4 months. The most recent releases landed on October 25, 2026 and October 24, 2026 respectively.

## The numbers

| Metric | Electrical calculation | Notopium |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/electrical-calculation/id6741321759/reviews)** | — |
| Number of ratings | **2** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | Free with in-app purchases | — |
| Size | 44 MB | 45 MB |
| Requires iOS | **12.0** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Shital Gorasiya](https://appshunter.io/developer/1737199158) | [Meisam Yousefzadeh](https://appshunter.io/developer/1854807801) |

## What reviewers say

### Electrical calculation

[App page](https://appshunter.io/ios/app/electrical-calculation/id6741321759)

This app helps with electrical wiring calculations for various buildings, ensuring compliance with the latest standards. It offers tools for load distribution and voltage drop estimation, aiding in efficient and safe electrical installations.

**Highlights:** Electrical wiring calculations, Cable and wire cross-section analysis, Load distribution analysis, Voltage drop estimation, Compliance with PUE standards

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Lifetime Premium | $9.99 | one-time |


### Notopium

[App page](https://appshunter.io/ios/app/notopium/id6759302623)

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

**In-app purchases:** none


## Frequently asked questions

### Is Electrical calculation free?

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

### Is Notopium free?

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

### Do Electrical calculation or Notopium have ads?

Neither Electrical calculation nor Notopium shows ads.

### Which is updated more often, Electrical calculation or Notopium?

Electrical calculation ships an update every 3 months, and Notopium every 4 months. Most recently, Electrical calculation was updated on October 25, 2026 and Notopium on October 24, 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.*