# Electrical Engineering Toolkit vs RF Calc JP

The clearest difference is update cadence: RF Calc JP at every 6 days against Electrical Engineering Toolkit's every 9 months. Electrical Engineering Toolkit's advantage is iOS requirement (16.2 vs 26.0). On price, ads, in-app purchases 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 and RF Calc JP sells 1 in-app purchase, starting at $0.99 per year. Whichever you choose, the download price is not the number that matters.

Electrical Engineering Toolkit ships an update every 9 months, RF Calc JP every 6 days. The most recent releases landed on November 4, 2026 and October 31, 2026 respectively.

## The numbers

| Metric | Electrical Engineering Toolkit | RF Calc JP |
| --- | --- | --- |
| 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 | Yes |
| Ads | No | No |
| Update frequency | Every 9 months | **Every 6 days** |
| Monetization | Free with in-app purchases | — |
| Size | 12 MB | 4 MB |
| Requires iOS | **16.2** | 26.0 |
| Devices | iPhone, iPad | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) | [Hashimoto Yoshikazu](https://appshunter.io/developer/6790925881) |

## 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 |


### RF Calc JP

[App page](https://appshunter.io/ios/app/rf-calc-jp/id6815598081)

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

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| RF Calc JP Pro (Yearly) | $0.99 | per year |


## Frequently asked questions

### Is Electrical Engineering Toolkit free?

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

### Is RF Calc JP free?

RF Calc JP is free to download, with in-app purchases available.

### Do Electrical Engineering Toolkit or RF Calc JP have ads?

Neither Electrical Engineering Toolkit nor RF Calc JP shows ads.

### Which is updated more often, Electrical Engineering Toolkit or RF Calc JP?

Electrical Engineering Toolkit ships an update every 9 months, and RF Calc JP every 6 days. Most recently, Electrical Engineering Toolkit was updated on November 4, 2026 and RF Calc JP 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.*