# RC Circuit vs Ratio Simplifier

The clearest difference is update cadence: RC Circuit at every 6 months against Ratio Simplifier's every 17 months. RC Circuit also leads on device support (3 vs 1) and iOS requirement (12.0 vs 16.0). On price, 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 Ratio Simplifier sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

RC Circuit ships an update every 6 months, Ratio Simplifier every 17 months. The most recent releases landed on September 24, 2026 and June 11, 2026 respectively.

## The numbers

| Metric | RC Circuit | Ratio Simplifier |
| --- | --- | --- |
| 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 17 months |
| Monetization | Free | — |
| Size | 16 MB | 4 MB |
| Requires iOS | **12.0** | 16.0 |
| Devices | **iPhone, iPad, iPod** | iPhone |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Agustiyansyah Syam](https://appshunter.io/developer/1770080692) |

## 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 |


### Ratio Simplifier

[App page](https://appshunter.io/ios/app/ratio-simplifier/id6711354787)

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Ratio Simplifier Pro | $1.99 | one-time |


## Frequently asked questions

### Is RC Circuit free?

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

### Is Ratio Simplifier free?

Ratio Simplifier is free to download, with in-app purchases available.

### Do RC Circuit or Ratio Simplifier have ads?

Neither RC Circuit nor Ratio Simplifier shows ads.

### Which is updated more often, RC Circuit or Ratio Simplifier?

RC Circuit ships an update every 6 months, and Ratio Simplifier every 17 months. Most recently, RC Circuit was updated on September 24, 2026 and Ratio Simplifier on June 11, 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.*