# ElectriCalc Pro vs Transformer Calculator.

The clearest difference is ads: ElectriCalc Pro at none against Transformer Calculator.'s shown. ElectriCalc Pro also leads on ratings volume (354 vs 47) and iOS requirement (14.0 vs 17.6). Transformer Calculator.'s advantage is update cadence (every 4 months vs every 10 months). On price, rating, in-app purchases and monetization model there is nothing between them.

Both are free to download. ElectriCalc Pro sells 2 in-app purchases, starting at $4.99 per month and Transformer Calculator. sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

On the App Store both sit at effectively the same score — 4.9 for ElectriCalc Pro against 4.8 for Transformer Calculator.. That said, the two scores are not equally well evidenced: ElectriCalc Pro has 354 ratings behind it against 47, so its average is the more settled of the two.

ElectriCalc Pro ships an update every 10 months, Transformer Calculator. every 4 months. The most recent releases landed on September 19, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | ElectriCalc Pro | Transformer Calculator. |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (354 ratings)](https://appshunter.io/ios/app/electricalc-pro/id569677304/reviews)** | [4.8 (47 ratings)](https://appshunter.io/ios/app/transformer-calculator/id1506155081/reviews) |
| Number of ratings | **354** | 47 |
| Positive reviews | 78.1% of reviews | — |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | **Every 4 months** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 29 MB | 41 MB |
| Requires iOS | **14.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 12+ | 4+ |
| Developer | [Calculated Industries](https://appshunter.io/developer/370406449) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## What reviewers say

### ElectriCalc Pro

[App page](https://appshunter.io/ios/app/electricalc-pro/id569677304)

This app provides electricians and electrical professionals with a powerful tool for performing complex calculations based on the latest National Electrical Code (NEC). It offers solutions for wire sizing, voltage drop, conduit sizing, and motor calculations, saving time and ensuring code compliance.

**Highlights:** NEC compliant calculations, Wire and conduit sizing, Voltage drop calculations, Motor full-load amps, Ohm's Law solver, Built-in help and tutorials

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

**In-app purchases (2)**

| Purchase | Price | Billing |
| --- | --- | --- |
| 1 Month Full Access | $4.99 | per month |
| 1 Year Full Access | $39.99 | per year |


### Transformer Calculator.

[App page](https://appshunter.io/ios/app/transformer-calculator/id1506155081)

This app simplifies transformer calculations for engineers and students. It accurately computes primary and secondary currents, turns ratios, and secondary voltages based on user inputs for transformer ratings and winding turns.

**Highlights:** Primary and secondary current calculations, Turns ratio determination, Transformer type identification, Secondary voltage calculation, Supports 1Φ and 3Φ phases, User-friendly interface

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Go Pro | $3.99 | one-time |


## Frequently asked questions

### Is ElectriCalc Pro free?

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

### Is Transformer Calculator. free?

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

### Which has better reviews, ElectriCalc Pro or Transformer Calculator.?

ElectriCalc Pro is rated higher. ElectriCalc Pro averages 4.9 out of 5 from 354 ratings, while Transformer Calculator. averages 4.8 from 47 ratings.

### Do ElectriCalc Pro or Transformer Calculator. have ads?

Transformer Calculator. shows ads; ElectriCalc Pro does not.

### Which is updated more often, ElectriCalc Pro or Transformer Calculator.?

ElectriCalc Pro ships an update every 10 months, and Transformer Calculator. every 4 months. Most recently, ElectriCalc Pro was updated on September 19, 2026 and Transformer Calculator. on September 18, 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.*