# 安得卫士 vs Flyback Transformer Designer

The clearest difference is in-app purchases: 安得卫士 at none against Flyback Transformer Designer's 1. Flyback Transformer Designer's advantage is device support. On price, update cadence 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. 安得卫士 asks for nothing beyond the download.

Both ship on a similar rhythm, roughly every 2 months. The most recent releases landed on October 27, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | 安得卫士 | Flyback Transformer Designer |
| --- | --- | --- |
| 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 | **No** | Yes |
| Ads | — | No |
| Update frequency | Every 2 months | Every 2 months |
| Monetization | — | Free with in-app purchases |
| Size | 32 MB | 8 MB |
| Requires iOS | 15.0 | 15.0 |
| Devices | — | **iPhone, iPad, iPod, Mac** |
| Age rating | 4+ | 4+ |
| Developer | [Beijing Ande Hezhong Science and Technology Co., Ltd.](https://appshunter.io/developer/1513154194) | [建忠 徐](https://appshunter.io/developer/1871049057) |

## What reviewers say

### 安得卫士

[App page](https://appshunter.io/ios/app/id6578445557)

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is 安得卫士 free?

安得卫士 is free to download, with no in-app purchases.

### Is Flyback Transformer Designer free?

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

### Which is updated more often, 安得卫士 or Flyback Transformer Designer?

安得卫士 ships an update every 2 months, and Flyback Transformer Designer every 2 months. Most recently, 安得卫士 was updated on October 27, 2026 and Flyback Transformer Designer on October 31, 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.*