# LED Calc. vs RC Circuit

The clearest difference is rating: RC Circuit at 4.8 against LED Calc.'s 1.0. RC Circuit also leads on ads (none vs shown) and ratings volume (5 vs 1). LED Calc.'s advantage is in-app purchases (none vs 1). 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. LED Calc. asks for nothing beyond the download.

RC Circuit holds the better App Store score, 4.8 against 1.0. That said, the two scores are not equally well evidenced: RC Circuit has 5 ratings behind it against 1, so its average is the more settled of the two.

LED Calc. ships an update every 10 months, RC Circuit every 6 months. The most recent releases landed on October 3, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | LED Calc. | RC Circuit |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/led-calc/id556845805/reviews) | **[4.8 (5 ratings)](https://appshunter.io/ios/app/rc-circuit/id824460716/reviews)** |
| Number of ratings | 1 | **5** |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Every 6 months** |
| Monetization | Ad-supported | **Free** |
| Size | 17 MB | 16 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [Jibiki Works](https://appshunter.io/developer/556845808) | [Siu Yuen Ho](https://appshunter.io/developer/814088527) |

## What reviewers say

### LED Calc.

[App page](https://appshunter.io/ios/app/led-calc/id556845805)

This application assists in designing electronic circuits by calculating the necessary resistor values for LEDs. It simplifies the process of determining the correct components for your LED projects.

**Highlights:** Resistor value calculation, LED circuit design assistance, Component value determination

**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 LED Calc. free?

LED Calc. 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, LED Calc. or RC Circuit?

RC Circuit is rated higher. LED Calc. averages 1.0 out of 5 from 1 ratings, while RC Circuit averages 4.8 from 5 ratings.

### Do LED Calc. or RC Circuit have ads?

LED Calc. shows ads; RC Circuit does not.

### Which is updated more often, LED Calc. or RC Circuit?

LED Calc. ships an update every 10 months, and RC Circuit every 6 months. Most recently, LED Calc. was updated on October 3, 2026 and RC Circuit on October 5, 2026.

---

*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*