# AVR Tutorial vs Resistor Code Calculators

The clearest difference is in-app purchases: Resistor Code Calculators at none against AVR Tutorial's 10. AVR Tutorial's advantage is ads (none vs shown) and update cadence (every 3 months vs every 7 months). On price and device support there is nothing between them.

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

AVR Tutorial ships an update every 3 months, Resistor Code Calculators every 7 months. The most recent releases landed on October 5, 2026 and September 17, 2026 respectively.

## The numbers

| Metric | AVR Tutorial | Resistor Code Calculators |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/avr-tutorial/id1070496499/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 75.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | **No** | Yes |
| Update frequency | **Every 3 months** | Every 7 months |
| Monetization | Free with in-app purchases | — |
| Size | 33 MB | 6 MB |
| Requires iOS | **9.0** | 13.4 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Kanta Kikubo](https://appshunter.io/developer/1450598215) |

## What reviewers say

### 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 |


### Resistor Code Calculators

[App page](https://appshunter.io/ios/app/resistor-code-calculators/id1465336419)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is AVR Tutorial free?

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

### Is Resistor Code Calculators free?

Resistor Code Calculators is free to download, with no in-app purchases.

### Do AVR Tutorial or Resistor Code Calculators have ads?

Resistor Code Calculators shows ads; AVR Tutorial does not.

### Which is updated more often, AVR Tutorial or Resistor Code Calculators?

AVR Tutorial ships an update every 3 months, and Resistor Code Calculators every 7 months. Most recently, AVR Tutorial was updated on October 5, 2026 and Resistor Code Calculators on September 17, 2026.

---

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