# Electrical Calc Pro vs Transformer Calculator.

The clearest difference is price: Transformer Calculator. at Free against Electrical Calc Pro's $19.99. Transformer Calculator. also leads on ratings volume (49 vs 1). Electrical Calc Pro's advantage is in-app purchases (none vs 1) and ads (none vs shown). On device support there is nothing between them.

Transformer Calculator. is free to download; Electrical Calc Pro costs $19.99 up front. Transformer Calculator. sells 1 one-off in-app purchase. Electrical Calc Pro asks for nothing beyond the download.

Electrical Calc Pro holds the better App Store score, 5.0 against 4.8. That said, the two scores are not equally well evidenced: Transformer Calculator. has 49 ratings behind it against 1, so its average is the more settled of the two.

Electrical Calc Pro ships an update every 5 weeks, Transformer Calculator. every 4 months. The most recent releases landed on November 1, 2026 and October 27, 2026 respectively.

## The numbers

| Metric | Electrical Calc Pro | Transformer Calculator. |
| --- | --- | --- |
| Price | $19.99 | **Free** |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/electrical-calc-pro/id514793318/reviews)** | [4.8 (49 ratings)](https://appshunter.io/ios/app/transformer-calculator/id1506155081/reviews) |
| Number of ratings | 1 | **49** |
| Positive reviews | 60.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | **No** | Yes |
| Update frequency | **Every 5 weeks** | Every 4 months |
| Monetization | Paid | **Free with in-app purchases** |
| Size | 22 MB | 41 MB |
| Requires iOS | **8.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) |

## What reviewers say

### Electrical Calc Pro

[App page](https://appshunter.io/ios/app/electrical-calc-pro/id514793318)

This professional electrical application calculates common electrical problems, including wire sizing, conduit sizing, and fusing based on the Canadian Electric Code. It offers advanced features for motor loads, transformers, feeders, and voltage drop calculations, making it an essential tool for electricians and engineers.

**Highlights:** Wire and conduit sizing, Motor and transformer load calculations, Voltage drop calculations, Panel legend creation and export, Allowable ampacity and derating, Box fill calculations

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

**In-app purchases:** none


### 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 Electrical Calc Pro free?

Electrical Calc Pro costs $19.99, with no in-app purchases.

### Is Transformer Calculator. free?

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

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

Electrical Calc Pro is rated higher. Electrical Calc Pro averages 5.0 out of 5 from 1 ratings, while Transformer Calculator. averages 4.8 from 49 ratings.

### Do Electrical Calc Pro or Transformer Calculator. have ads?

Transformer Calculator. shows ads; Electrical Calc Pro does not.

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

Electrical Calc Pro ships an update every 5 weeks, and Transformer Calculator. every 4 months. Most recently, Electrical Calc Pro was updated on November 1, 2026 and Transformer Calculator. on October 27, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*