# RC Circuit vs Resistor Code Calculators

The clearest difference is in-app purchases: Resistor Code Calculators at none against RC Circuit's 1. RC Circuit's advantage is ads (none vs shown). On price, update cadence, device support and iOS requirement there is nothing between them.

Both are free to download. RC Circuit sells 1 one-off in-app purchase. Resistor Code Calculators asks for nothing beyond the download.

RC Circuit ships an update every 6 months, Resistor Code Calculators every 7 months. The most recent releases landed on September 24, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | RC Circuit | Resistor Code Calculators |
| --- | --- | --- |
| 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 | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 6 months** | Every 7 months |
| Monetization | Free | — |
| Size | 16 MB | 6 MB |
| Requires iOS | **12.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Kanta Kikubo](https://appshunter.io/developer/1450598215) |

## 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 |


### Resistor Code Calculators

[App page](https://appshunter.io/ios/app/resistor-code-calculators/id1465336419)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is RC Circuit free?

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

### Is Resistor Code Calculators free?

Resistor Code Calculators is free to download, with no in-app purchases.

### Do RC Circuit or Resistor Code Calculators have ads?

Resistor Code Calculators shows ads; RC Circuit does not.

### Which is updated more often, RC Circuit or Resistor Code Calculators?

RC Circuit ships an update every 6 months, and Resistor Code Calculators every 7 months. Most recently, RC Circuit was updated on September 24, 2026 and Resistor Code Calculators on September 17, 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.*