Comparison

MyTWS vs Flyback Transformer Designer

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

MyTWS

Features
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MyTWS app is a powerful tool designed to enhance the user experience for TWS battery owners. It offers the following key features: 1. Real-time monitoring of battery data and status. 2. Access to essential battery information. 3. Smart diagnostics for battery health and performance. 4. Battery services such as firmware updates and more.

About

Flyback Transformer Designer

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
Read full description

Flyback Transformer Designer turns your flyback power supply spec into a complete transformer design — core, gap, turns, wire gauge, and loss breakdown — all computed locally on your device, no internet required. Built for power-electronics engineers who need more than a spreadsheet. Covers all four operating modes: DCM, BCM, QR, and CCM. Supports multi-output secondaries with independent winding design, not a simplified single-output approximation. Three steps to a finished design: 1. Enter your spec — Vin range, output voltages, power, frequency, and design constraints. 2. Review the top 5 core candidates — gap, Lm, winding layout, wire selection, copper/core losses, and temperature-rise estimates; switch the ranking between balanced, high-reliability, or lowest-loss. 3. Export a professional summary report (PDF or JSON). Why you'll like it: - Full core × turns × wire-gauge iteration with built-in AP pre-screening — no more flipping through datasheets by hand. - Optional B_max design ceiling — leave it blank and the engine guards against saturation automatically using the material's Bsat×70% margin, so an overly conservative guess won't rule out viable designs; set your own ceiling anytime for an extra constraint. - Built-in ferrite core library (EE, RM, PQ, ETD, etc.) plus My Database for your own materials, cores, and bobbins. - Parameter sweep — explore f_sw, load, and Vin sensitivity curves before you wind a single turn. - 100% local computation; your data never leaves your device. - Native support for iPhone, iPad, and Mac (Apple silicon); switch between Chinese and English. 3-day full-feature trial from first launch — you are not charged when it ends. After the trial, a one-time App Store purchase unlocks steps 2–3, My Database editing, and export. This is not a subscription and does not auto-renew. Existing annual subscriptions remain valid until they expire. Privacy Policy: https://tobebetter2026.github.io/Public-documents-Flyback-Transformer-Designer/privacy-policy.html Terms of Use: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ (Apple Standard EULA)

Screenshots

MyTWS4 screens
Flyback Transformer Designer4 screens

Verdict

The call

The clearest difference is in-app purchases: MyTWS at none against Flyback Transformer Designer's 1. Flyback Transformer Designer's advantage is device support (4 vs 2). On price, update cadence, ads and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Flyback Transformer Designer sells 1 in-app purchase, starting at $29.99 per year. MyTWS asks for nothing beyond the download.

UpkeepUpdate frequency

MyTWS ships an update every 6 weeks, Flyback Transformer Designer every 2 months. The most recent releases landed on October 24, 2026 and October 25, 2026 respectively.

Scorecard2 real differences · 7 level
MyTWS versus Flyback Transformer Designer: the parameters behind the verdict, then further details
ParameterMyTWSFlyback Transformer Designer
PriceFreeFree
Rating—5.0 (1 ratings) — better
Number of ratings—1 — better
Update frequencyEvery 6 weeks — betterEvery 2 months
AdsNoNo
In-app purchasesNo — betterYes
Monetization—Free with in-app purchases
DevicesiPhone, iPodiPhone, iPad, iPod, Mac — better
Requires iOS15.115.0 — better
Further details — not scored
Size81 MB8 MB
Age rating4+4+
DeveloperTWS建忠 徐

In-app purchases

None

MyTWS

No in-app purchases

1 purchases

Flyback Transformer Designer

Subscriptions1
  • Annual subscription14 Days trial$29.991 Year

Questions

Is MyTWS free?
MyTWS 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.
Do MyTWS or Flyback Transformer Designer have ads?
Neither MyTWS nor Flyback Transformer Designer shows ads.
Which is updated more often, MyTWS or Flyback Transformer Designer?
MyTWS ships an update every 6 weeks, and Flyback Transformer Designer every 2 months. Most recently, MyTWS was updated on October 24, 2026 and Flyback Transformer Designer on October 25, 2026.

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