# Flyback Transformer Designer vs Codewire

The clearest difference is update cadence: Codewire at every 5 days against Flyback Transformer Designer's every 2 months. Flyback Transformer Designer's advantage is device support (4 vs 2). On price, ads, in-app purchases and iOS requirement there is nothing between them.

Both are free to download. Flyback Transformer Designer sells 1 in-app purchase, starting at $29.99 per year and Codewire sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Flyback Transformer Designer ships an update every 2 months, Codewire every 5 days. Both last shipped on October 25, 2026.

## The numbers

| Metric | Flyback Transformer Designer | Codewire |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/flyback-transformer-designer/id6771727431/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 5 days** |
| Monetization | Free with in-app purchases | — |
| Size | 8 MB | 10 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | **iPhone, iPad, iPod, Mac** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [建忠 徐](https://appshunter.io/developer/1871049057) | [Peter Hallander](https://appshunter.io/developer/6779583782) |

## What reviewers say

### Flyback Transformer Designer

[App page](https://appshunter.io/ios/app/flyback-transformer-designer/id6771727431)

Design flyback transformers with detailed calculations for core, gap, turns, and wire gauge. Supports multiple operating modes and secondary outputs, with local computation and exportable reports. Offers a trial period followed by a one-time purchase.

**Highlights:** Complete transformer design calculations, Supports DCM, BCM, QR, and CCM modes, Multi-output secondary winding design, Core, gap, turns, and wire gauge iteration, Built-in ferrite core library, Exportable PDF and JSON reports, Local computation, no internet required

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Annual subscription | $29.99 | per year |


### Codewire

[App page](https://appshunter.io/ios/app/codewire-electrician-calc/id6780236489)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Codewire Pro | $9.99 | one-time |


## Frequently asked questions

### Is Flyback Transformer Designer free?

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

### Is Codewire free?

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

### Do Flyback Transformer Designer or Codewire have ads?

Neither Flyback Transformer Designer nor Codewire shows ads.

### Which is updated more often, Flyback Transformer Designer or Codewire?

Flyback Transformer Designer ships an update every 2 months, and Codewire every 5 days. Most recently, Flyback Transformer Designer was updated on October 25, 2026 and Codewire on October 25, 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.*