# RC Circuit vs Electrical Engineering Toolkit

The clearest difference is iOS requirement: RC Circuit at 12.0 against Electrical Engineering Toolkit's 16.2. On price, update cadence, ads and in-app purchases there is nothing between them.

Both are free to download. RC Circuit sells 1 one-off in-app purchase and Electrical Engineering Toolkit sells 3 in-app purchases, starting at $0.99 per month. Whichever you choose, the download price is not the number that matters.

RC Circuit ships an update every 6 months, Electrical Engineering Toolkit every 9 months. The most recent releases landed on October 5, 2026 and October 12, 2026 respectively.

## The numbers

| Metric | RC Circuit | Electrical Engineering Toolkit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (5 ratings)](https://appshunter.io/ios/app/rc-circuit/id824460716/reviews)** | — |
| Number of ratings | **5** | — |
| In-app purchases | Yes | Yes |
| Ads | No | No |
| Update frequency | **Every 6 months** | Every 9 months |
| Monetization | Free | — |
| Size | 16 MB | 12 MB |
| Requires iOS | **12.0** | 16.2 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Vladislav Zhirnov](https://appshunter.io/developer/1476188065) |

## What reviewers say

### RC Circuit

[App page](https://appshunter.io/ios/app/rc-circuit/id824460716)

Calculate RC charging and filter circuits, including time constants and cutoff frequencies. Find component values from these parameters or get voltage at specific times. Save and share data easily.

**Highlights:** Calculate time constant, Find component values, Get voltage at time t, Calculate cutoff frequency, Save data to CSV, Upload CSV via AirDrop/iCloud Drive, Multi-language support

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro features | $0.99 | one-time |


### Electrical Engineering Toolkit

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

**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 |


## Frequently asked questions

### Is RC Circuit free?

RC Circuit is free to download, with in-app purchases available.

### Is Electrical Engineering Toolkit free?

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

### Do RC Circuit or Electrical Engineering Toolkit have ads?

Neither RC Circuit nor Electrical Engineering Toolkit shows ads.

### Which is updated more often, RC Circuit or Electrical Engineering Toolkit?

RC Circuit ships an update every 6 months, and Electrical Engineering Toolkit every 9 months. Most recently, RC Circuit was updated on October 5, 2026 and Electrical Engineering Toolkit on October 12, 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.*