# Electrical Engineering Toolkit vs Cheung Hing

The clearest difference is in-app purchases: Cheung Hing at none against Electrical Engineering Toolkit's 3. Cheung Hing also leads on update cadence (every 2 weeks vs every 9 months) and iOS requirement (13.0 vs 16.2). On price, ads and device support there is nothing between them.

Both are free to download. Electrical Engineering Toolkit sells 3 in-app purchases, starting at $0.99 per month. Cheung Hing asks for nothing beyond the download.

Electrical Engineering Toolkit ships an update every 9 months, Cheung Hing every 2 weeks. The most recent releases landed on October 25, 2026 and October 28, 2026 respectively.

## The numbers

| Metric | Electrical Engineering Toolkit | Cheung Hing |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (1 ratings)](https://appshunter.io/ios/app/electrical-engineering-toolkit/id6474202026/reviews)** | — |
| Number of ratings | **1** | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 2 weeks** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 61 MB |
| Requires iOS | 16.2 | **13.0** |
| Devices | iPhone, iPad | **iPhone, iPad, iPod** |
| Age rating | 4+ | 17+ |
| Developer | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) | [Cheung Hing Electronic & Electrical Engineering Co. Ltd.](https://appshunter.io/developer/1536114207) |

## What reviewers say

### Electrical Engineering Toolkit

[App page](https://appshunter.io/ios/app/electrical-engineering-toolkit/id6474202026)

This comprehensive toolkit offers a wide range of calculators for electronics design, PCB layout, and RF work. Instantly check formulas, verify lab results, and estimate component values for various engineering tasks.

**Highlights:** Ohm's Law calculator, Resistor color code lookup, PCB impedance calculation, RF power and dB converters, Electromechanical calculations, Physics and foundation formulas

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

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full version / monthly | $0.99 | per month |
| Full version / year | $3.99 | per year |
| Support project, remove ADS | $5.99 | one-time |


### Cheung Hing

[App page](https://appshunter.io/ios/app/cheung-hing/id6739491196)

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

**In-app purchases:** none


## Frequently asked questions

### Is Electrical Engineering Toolkit free?

Electrical Engineering Toolkit is free to download, with in-app purchases available.

### Is Cheung Hing free?

Cheung Hing is free to download, with no in-app purchases.

### Do Electrical Engineering Toolkit or Cheung Hing have ads?

Neither Electrical Engineering Toolkit nor Cheung Hing shows ads.

### Which is updated more often, Electrical Engineering Toolkit or Cheung Hing?

Electrical Engineering Toolkit ships an update every 9 months, and Cheung Hing every 2 weeks. Most recently, Electrical Engineering Toolkit was updated on October 25, 2026 and Cheung Hing on October 28, 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.*