# LED Calc. vs AVR Tutorial

The clearest difference is rating: AVR Tutorial at 5.0 against LED Calc.'s 1.0. AVR Tutorial also leads on ads (none vs shown) and review sentiment (75% vs 50%). LED Calc.'s advantage is in-app purchases (none vs 10). On price, ratings volume and device support there is nothing between them.

Both are free to download. AVR Tutorial sells 10 one-off in-app purchases. LED Calc. asks for nothing beyond the download.

AVR Tutorial holds the better App Store score, 5.0 against 1.0. Both are backed by a comparable volume of ratings — 1 and 2 respectively. Written reviews point the same way: 50% of LED Calc.'s written reviews are positive against 75% of AVR Tutorial's.

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

## The numbers

| Metric | LED Calc. | AVR Tutorial |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (1 ratings)](https://appshunter.io/ios/app/led-calc/id556845805/reviews) | **[5.0 (2 ratings)](https://appshunter.io/ios/app/avr-tutorial/id1070496499/reviews)** |
| Number of ratings | 1 | **2** |
| Positive reviews | 50.0% of reviews | **75.0% of reviews** |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Every 3 months** |
| Monetization | **Ad-supported** | Free with in-app purchases |
| Size | 17 MB | 33 MB |
| Requires iOS | 12.0 | **9.0** |
| 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


### AVR Tutorial

[App page](https://appshunter.io/ios/app/avr-tutorial/id1070496499)

This app simplifies learning AVR microcontrollers with a code wizard that generates C source code for various peripherals. It offers demo projects and an architecture review, making complex MCU programming more accessible for hobbyists and students.

**Highlights:** AVR architecture review, AVR assembly and C language, 21 demo projects, Code wizard for peripherals, Portability to other ATMEGA MCUs, I2C and SPI EEPROM support (PRO)

**Features:** Vision Pro support

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock PRO feature | $1.99 | one-time |
| SPI OLED | $1.99 | one-time |
| I2C OLED | $1.99 | one-time |
| Wifi home automation | $1.99 | one-time |
| 2.2" TFT | $1.99 | one-time |
| LoRa home automation | $1.99 | one-time |
| Home automation using Siri | $2.99 | one-time |
| Home automation using Google | $2.99 | one-time |
| BT home automation | $4.99 | one-time |
| BLE home automation | $4.99 | one-time |


## Frequently asked questions

### Is LED Calc. free?

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

### Is AVR Tutorial free?

AVR Tutorial is free to download, with in-app purchases available.

### Which has better reviews, LED Calc. or AVR Tutorial?

AVR Tutorial is rated higher. LED Calc. averages 1.0 out of 5 from 1 ratings, while AVR Tutorial averages 5.0 from 2 ratings.

### Do LED Calc. or AVR Tutorial have ads?

LED Calc. shows ads; AVR Tutorial does not.

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

LED Calc. ships an update every 10 months, and AVR Tutorial every 3 months. Most recently, LED Calc. was updated on October 3, 2026 and AVR Tutorial on October 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.*