# Audio Transformer Calculator vs Arduino Programming Pro

The clearest difference is rating: Arduino Programming Pro at 4.6 against Audio Transformer Calculator's 3.8. Arduino Programming Pro also leads on price ($4.99 vs $11.99) and update cadence (every 6 weeks vs every 5 months). Audio Transformer Calculator's advantage is iOS requirement (12.0 vs 16.0). On review sentiment, ratings volume, ads and in-app purchases there is nothing between them.

Audio Transformer Calculator costs $11.99 and Arduino Programming Pro $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Arduino Programming Pro holds the better App Store score, 4.6 against 3.8. Both are backed by a comparable volume of ratings — 5 and 5 respectively. Written reviews point the same way: 67% of Audio Transformer Calculator's written reviews are positive against 71% of Arduino Programming Pro's.

Audio Transformer Calculator ships an update every 5 months, Arduino Programming Pro every 6 weeks. Both last shipped on October 27, 2026.

## The numbers

| Metric | Audio Transformer Calculator | Arduino Programming Pro |
| --- | --- | --- |
| Price | $11.99 | **$4.99** |
| Rating | [3.8 (5 ratings)](https://appshunter.io/ios/app/audio-transformer-calculator/id1500812310/reviews) | **[4.6 (5 ratings)](https://appshunter.io/ios/app/arduino-programming-pro/id6447102673/reviews)** |
| Number of ratings | 5 | 5 |
| Positive reviews | 66.7% of reviews | **71.4% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 5 months | **Every 6 weeks** |
| Monetization | Paid | Paid |
| Best chart rank | — | **#193** |
| Size | 9 MB | 45 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Mac |
| Age rating | 4+ | 4+ |
| Developer | [Marko Delac](https://appshunter.io/developer/1500812309) | [ALG Software Lab](https://appshunter.io/developer/1650561236) |

## What reviewers say

### Audio Transformer Calculator

[App page](https://appshunter.io/ios/app/audio-transformer-calculator/id1500812310)

This app simplifies the calculation of power and audio transformers for DIY electronics projects, particularly tube amplifiers. It handles various transformer types and core configurations with user-friendly input of voltages, currents, or impedances. Enhanced features offer more capabilities than traditional spreadsheet calculators.

**Highlights:** Calculate power transformers, Calculate audio transformers (push-pull, single-ended), Supports tube amplifier builds, Handles E-I type cores, Calculates for vintage and modern amplifiers, Supports transformers with multiple taps

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

**In-app purchases:** none


### Arduino Programming Pro

[App page](https://appshunter.io/ios/app/arduino-programming-pro/id6447102673)

**Currently charting:** #193 Top Paid · Education (US App Store)

Master Arduino programming with over 200 practical lessons, circuit diagrams, and code examples. This app guides beginners and experienced users through electronics and project building in 14 languages. The Pro version offers advanced features for enhanced learning.

**Highlights:** 200+ practical lessons, Circuit diagrams and wiring guides, Ready-to-use code examples, Interactive quiz questions, Support for 14 languages, Full-text search (Pro version), Favorites for saving topics (Pro version)

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is Audio Transformer Calculator free?

Audio Transformer Calculator costs $11.99, with no in-app purchases.

### Is Arduino Programming Pro free?

Arduino Programming Pro costs $4.99, with no in-app purchases.

### Which has better reviews, Audio Transformer Calculator or Arduino Programming Pro?

Arduino Programming Pro is rated higher. Audio Transformer Calculator averages 3.8 out of 5 from 5 ratings, while Arduino Programming Pro averages 4.6 from 5 ratings.

### Do Audio Transformer Calculator or Arduino Programming Pro have ads?

Neither Audio Transformer Calculator nor Arduino Programming Pro shows ads.

### Which is updated more often, Audio Transformer Calculator or Arduino Programming Pro?

Audio Transformer Calculator ships an update every 5 months, and Arduino Programming Pro every 6 weeks. Most recently, Audio Transformer Calculator was updated on October 27, 2026 and Arduino Programming Pro on October 27, 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.*