# Graycode vs LED Calc.

The clearest difference is price: LED Calc. at Free against Graycode's $2.99. Graycode's advantage is rating (3.0 vs 1.0) and ads (none vs shown). On ratings volume, update cadence, in-app purchases and device support there is nothing between them.

LED Calc. is free to download; Graycode costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

Graycode holds the better App Store score, 3.0 against 1.0. Both are backed by a comparable volume of ratings — 2 and 1 respectively. Written reviews point the same way: 67% of Graycode's written reviews are positive against 50% of LED Calc.'s.

Both ship on a similar rhythm, roughly every 10 months. The most recent releases landed on August 26, 2026 and June 5, 2026 respectively.

## The numbers

| Metric | Graycode | LED Calc. |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| Rating | **[3.0 (2 ratings)](https://appshunter.io/ios/app/graycode/id548428653/reviews)** | [1.0 (1 ratings)](https://appshunter.io/ios/app/led-calc/id556845805/reviews) |
| Number of ratings | **2** | 1 |
| Positive reviews | **66.7% of reviews** | 50.0% of reviews |
| In-app purchases | No | No |
| Ads | **No** | Yes |
| Update frequency | Every 10 months | Every 10 months |
| Monetization | Paid | **Ad-supported** |
| Size | 2 MB | 17 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Duo Pisceses, Inc.](https://appshunter.io/developer/850707063) | [Jibiki Works](https://appshunter.io/developer/556845808) |

## What reviewers say

### Graycode

[App page](https://appshunter.io/ios/app/graycode/id548428653)

This utility converts numbers between decimal, hexadecimal, binary, and Gray code formats. Changes to one value automatically update the others, making it a convenient tool for engineers. It also features an animated demonstration of the Tower of Hanoi puzzle.

**Highlights:** Decimal, hex, binary, Gray code conversion, Real-time updates, Handy calculator for engineers, Animated Tower of Hanoi solution, Supports iPhone, iPad, iPod

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### 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


## Frequently asked questions

### Is Graycode free?

Graycode costs $2.99, with no in-app purchases.

### Is LED Calc. free?

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

### Which has better reviews, Graycode or LED Calc.?

Graycode is rated higher. Graycode averages 3.0 out of 5 from 2 ratings, while LED Calc. averages 1.0 from 1 ratings.

### Do Graycode or LED Calc. have ads?

LED Calc. shows ads; Graycode does not.

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

Graycode ships an update every 10 months, and LED Calc. every 10 months. Most recently, Graycode was updated on August 26, 2026 and LED Calc. on June 5, 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.*