# AVR Tutorial vs K4 Control for Elecraft K4

The clearest difference is price: AVR Tutorial at Free against K4 Control for Elecraft K4's $89.99. AVR Tutorial also leads on rating (5.0 vs 4.8) and iOS requirement (9.0 vs 17.6). K4 Control for Elecraft K4's advantage is in-app purchases (none vs 10) and update cadence (every 2 weeks vs every 3 months). On ratings volume, ads and device support there is nothing between them.

AVR Tutorial is free to download; K4 Control for Elecraft K4 costs $89.99 up front. AVR Tutorial sells 10 one-off in-app purchases. K4 Control for Elecraft K4 asks for nothing beyond the download.

AVR Tutorial holds the better App Store score, 5.0 against 4.8. Both are backed by a comparable volume of ratings — 2 and 5 respectively. Written reviews complicate that: 75% of AVR Tutorial's written reviews are positive against 100% of K4 Control for Elecraft K4's, so the app with the better star average is not the one people write more warmly about.

AVR Tutorial ships an update every 3 months, K4 Control for Elecraft K4 every 2 weeks. The most recent releases landed on September 24, 2026 and September 8, 2026 respectively.

## The numbers

| Metric | AVR Tutorial | K4 Control for Elecraft K4 |
| --- | --- | --- |
| Price | **Free** | $89.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/avr-tutorial/id1070496499/reviews)** | [4.8 (5 ratings)](https://appshunter.io/ios/app/k4-control-for-elecraft-k4/id6738920761/reviews) |
| Number of ratings | 2 | **5** |
| Positive reviews | 75.0% of reviews | **100.0% of reviews** |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | Every 3 months | **Every 2 weeks** |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 33 MB | 50 MB |
| Requires iOS | **9.0** | 17.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Marcus Roskosch](https://appshunter.io/developer/334053438) |

## 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 |


### K4 Control for Elecraft K4

[App page](https://appshunter.io/ios/app/k4-control-for-elecraft-k4/id6738920761)

Control your Elecraft K4 transceiver remotely from your iPad. Operate locally or over the internet, with integrated digital modes, logging, and advanced visual features.

**Highlights:** Full remote transceiver control, Integrated digital modes (FT8, FT4, CW, SSTV), Comprehensive logbook with ADIF support, Dual VFO and waterfall displays, DX-Cluster integration and alerts, Visual band mapping and callsign data

**In-app purchases:** none


## Frequently asked questions

### Is AVR Tutorial free?

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

### Is K4 Control for Elecraft K4 free?

K4 Control for Elecraft K4 costs $89.99, with no in-app purchases.

### Which has better reviews, AVR Tutorial or K4 Control for Elecraft K4?

AVR Tutorial is rated higher. AVR Tutorial averages 5.0 out of 5 from 2 ratings, while K4 Control for Elecraft K4 averages 4.8 from 5 ratings.

### Do AVR Tutorial or K4 Control for Elecraft K4 have ads?

Neither AVR Tutorial nor K4 Control for Elecraft K4 shows ads.

### Which is updated more often, AVR Tutorial or K4 Control for Elecraft K4?

AVR Tutorial ships an update every 3 months, and K4 Control for Elecraft K4 every 2 weeks. Most recently, AVR Tutorial was updated on September 24, 2026 and K4 Control for Elecraft K4 on September 8, 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.*