# Transformer Calculator. vs Transformer Calc 2

The clearest difference is price: Transformer Calculator. at Free against Transformer Calc 2's $3.99. Transformer Calculator. also leads on rating (4.8 vs 1.0) and ratings volume (49 vs 1). Transformer Calc 2'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; Transformer Calc 2 costs $3.99 up front. Transformer Calculator. sells 1 one-off in-app purchase. Transformer Calc 2 asks for nothing beyond the download.

Transformer Calculator. holds the better App Store score, 4.8 against 1.0. 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.

Transformer Calculator. ships an update every 4 months, Transformer Calc 2 every 2 months. The most recent releases landed on November 4, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Transformer Calculator. | Transformer Calc 2 |
| --- | --- | --- |
| Price | **Free** | $3.99 |
| Rating | **[4.8 (49 ratings)](https://appshunter.io/ios/app/transformer-calculator/id1506155081/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/transformer-calc-2/id1597015791/reviews) |
| Number of ratings | **49** | 1 |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | Yes | **No** |
| Update frequency | Every 4 months | **Every 2 months** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 41 MB | 16 MB |
| Requires iOS | **17.6** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [V PUGAZHENTHI](https://appshunter.io/developer/491898049) | [Snappy Appz Inc.](https://appshunter.io/developer/375591377) |

## What reviewers say

### 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 |


### Transformer Calc 2

[App page](https://appshunter.io/ios/app/transformer-calc-2/id1597015791)

This app provides electricians with instant transformer sizing and advanced construction math, compliant with both US (NEC 2023) and Canadian (CEC 2024) electrical codes. It simplifies complex calculations for wire, conduit, and overcurrent protection, and includes a fractional construction calculator.

**Highlights:** Dual code compliance (NEC 2023, CEC 2024), Instant transformer sizing, Wire and conduit sizing, Overcurrent protection calculation, Fractional construction calculator, Unit conversion, Dark mode support

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

**In-app purchases:** none


## Frequently asked questions

### Is Transformer Calculator. free?

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

### Is Transformer Calc 2 free?

Transformer Calc 2 costs $3.99, with no in-app purchases.

### Which has better reviews, Transformer Calculator. or Transformer Calc 2?

Transformer Calculator. is rated higher. Transformer Calculator. averages 4.8 out of 5 from 49 ratings, while Transformer Calc 2 averages 1.0 from 1 ratings.

### Do Transformer Calculator. or Transformer Calc 2 have ads?

Transformer Calculator. shows ads; Transformer Calc 2 does not.

### Which is updated more often, Transformer Calculator. or Transformer Calc 2?

Transformer Calculator. ships an update every 4 months, and Transformer Calc 2 every 2 months. Most recently, Transformer Calculator. was updated on November 4, 2026 and Transformer Calc 2 on November 3, 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.*