# DigiCompCalc vs RC Circuit

The clearest difference is in-app purchases: DigiCompCalc at none against RC Circuit's 1. DigiCompCalc also leads on rating (5.0 vs 4.8). RC Circuit's advantage is update cadence (every 6 months vs every 68 months) and device support (3 vs 1). On price, ratings volume, ads and monetization model there is nothing between them.

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

DigiCompCalc holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 2 and 5 respectively.

DigiCompCalc ships an update every 68 months, RC Circuit every 6 months. The most recent releases landed on September 18, 2026 and September 26, 2026 respectively.

## The numbers

| Metric | DigiCompCalc | RC Circuit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/digicompcalc/id559620424/reviews)** | [4.8 (5 ratings)](https://appshunter.io/ios/app/rc-circuit/id824460716/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 68 months | **Every 6 months** |
| Monetization | Free | Free |
| Size | 1 MB | 16 MB |
| Requires iOS | 16.0 | **12.0** |
| Devices | iPhone | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Ernie Zappacosta](https://appshunter.io/developer/509385502) | [Siu Yuen Ho](https://appshunter.io/developer/814088527) |

## What reviewers say

### DigiCompCalc

[App page](https://appshunter.io/ios/app/digicompcalc/id559620424)

This utility app simplifies digital power compensator coefficient calculations. It allows users to input data and obtain results directly on their mobile device, eliminating the need for complex desktop software. Results can be emailed for easy sharing.

**Highlights:** Calculate coefficients from analog compensator values, Calculate coefficients directly using poles and zeros, Email results, Remembers last calculated variables, Dark Mode support

**Features:** macOS Compatibility

**In-app purchases:** none


### 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 |


## Frequently asked questions

### Is DigiCompCalc free?

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

### Is RC Circuit free?

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

### Which has better reviews, DigiCompCalc or RC Circuit?

DigiCompCalc is rated higher. DigiCompCalc averages 5.0 out of 5 from 2 ratings, while RC Circuit averages 4.8 from 5 ratings.

### Do DigiCompCalc or RC Circuit have ads?

Neither DigiCompCalc nor RC Circuit shows ads.

### Which is updated more often, DigiCompCalc or RC Circuit?

DigiCompCalc ships an update every 68 months, and RC Circuit every 6 months. Most recently, DigiCompCalc was updated on September 18, 2026 and RC Circuit on September 26, 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.*