# Electrical Motor vs Calculation Transformers

The clearest difference is price: Calculation Transformers at Free against Electrical Motor's $3.99. Calculation Transformers also leads on update cadence (every 5 months vs every 46 months). Electrical Motor's advantage is in-app purchases (none vs 1) and iOS requirement (11.0 vs 13.0). On ads and device support there is nothing between them.

Calculation Transformers is free to download; Electrical Motor costs $3.99 up front. Calculation Transformers sells 1 one-off in-app purchase. Electrical Motor asks for nothing beyond the download.

Electrical Motor ships an update every 46 months, Calculation Transformers every 5 months. The most recent releases landed on October 14, 2026 and October 16, 2026 respectively.

## The numbers

| Metric | Electrical Motor | Calculation Transformers |
| --- | --- | --- |
| Price | $3.99 | **Free** |
| Rating | **[1.0 (1 ratings)](https://appshunter.io/ios/app/electrical-motor-calculator/id1450628327/reviews)** | — |
| Number of ratings | **1** | — |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 46 months | **Every 5 months** |
| Monetization | Paid | — |
| Size | 9 MB | 56 MB |
| Requires iOS | **11.0** | 13.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Gorasiya Vishal Nanjibhai](https://appshunter.io/developer/1287086933) | [Nanjibhai Gorasiya](https://appshunter.io/developer/1834066312) |

## What reviewers say

### Electrical Motor

[App page](https://appshunter.io/ios/app/electrical-motor-calculator/id1450628327)

This app helps electricians and technicians learn about electric motor rewinding, wiring, and repair. It includes various wiring diagrams and a calculator for motor specifications like speed, horsepower, and frequency.

**Highlights:** Electric motor rewinding guide, Wiring diagrams for three-phase motors, Motor speed calculator, Horsepower calculator, Frequency and pole number calculator, Unit conversion (Watts/Volts/Amps)

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

**In-app purchases:** none


### Calculation Transformers

[App page](https://appshunter.io/ios/app/calculation-transformers/id6759037556)

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

**In-app purchases (1)**

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


## Frequently asked questions

### Is Electrical Motor free?

Electrical Motor costs $3.99, with no in-app purchases.

### Is Calculation Transformers free?

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

### Do Electrical Motor or Calculation Transformers have ads?

Neither Electrical Motor nor Calculation Transformers shows ads.

### Which is updated more often, Electrical Motor or Calculation Transformers?

Electrical Motor ships an update every 46 months, and Calculation Transformers every 5 months. Most recently, Electrical Motor was updated on October 14, 2026 and Calculation Transformers on October 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.*