# Transformer Designer vs Square Dance Conventions

The clearest difference is price: Square Dance Conventions at Free against Transformer Designer's $1.99. Square Dance Conventions also leads on update cadence (every 7 months vs every 38 months). Transformer Designer's advantage is iOS requirement (13.5 vs 15.0). On ads, in-app purchases and device support there is nothing between them.

Square Dance Conventions is free to download; Transformer Designer costs $1.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Transformer Designer ships an update every 38 months, Square Dance Conventions every 7 months. The most recent releases landed on October 23, 2026 and September 24, 2026 respectively.

## The numbers

| Metric | Transformer Designer | Square Dance Conventions |
| --- | --- | --- |
| Price | $1.99 | **Free** |
| Rating | **[3.0 (1 ratings)](https://appshunter.io/ios/app/transformer-designer/id1541116996/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 38 months | **Every 7 months** |
| Monetization | Paid | — |
| Size | 2 MB | 62 MB |
| Requires iOS | **13.5** | 15.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Suresh Verma](https://appshunter.io/developer/1207634042) | [Barry Johnson](https://appshunter.io/developer/1122710185) |

## What reviewers say

### Transformer Designer

[App page](https://appshunter.io/ios/app/transformer-designer/id1541116996)

Calculate design parameters for single-phase EI type transformers. This app assists designers in determining key values like turns per volt, coil turns, and power for two-winding transformers.

**Highlights:** Calculate Transformer Turn/volt, Determine primary coil turns, Determine secondary coil turns, Calculate primary coil amperage, Calculate secondary coil amperage, Calculate transformer power

**Features:** macOS Compatibility

**In-app purchases:** none


### Square Dance Conventions

[App page](https://appshunter.io/ios/app/square-dance-conventions/id6747088498)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Transformer Designer free?

Transformer Designer costs $1.99, with no in-app purchases.

### Is Square Dance Conventions free?

Square Dance Conventions is free to download, with no in-app purchases.

### Do Transformer Designer or Square Dance Conventions have ads?

Neither Transformer Designer nor Square Dance Conventions shows ads.

### Which is updated more often, Transformer Designer or Square Dance Conventions?

Transformer Designer ships an update every 38 months, and Square Dance Conventions every 7 months. Most recently, Transformer Designer was updated on October 23, 2026 and Square Dance Conventions on September 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.*