# AVR Tutorial vs SDR Receiver

The clearest difference is price: AVR Tutorial at Free against SDR Receiver's $9.99. AVR Tutorial also leads on rating (5.0 vs 4.1) and iOS requirement (9.0 vs 17.0). SDR Receiver's advantage is in-app purchases (none vs 10) and ratings volume (15 vs 2). On review sentiment, update cadence, ads and device support there is nothing between them.

AVR Tutorial is free to download; SDR Receiver costs $9.99 up front. AVR Tutorial sells 10 one-off in-app purchases. SDR Receiver asks for nothing beyond the download.

AVR Tutorial holds the better App Store score, 5.0 against 4.1. That said, the two scores are not equally well evidenced: SDR Receiver has 15 ratings behind it against 2, so its average is the more settled of the two. Written reviews point the same way: 75% of AVR Tutorial's written reviews are positive against 72% of SDR Receiver's.

AVR Tutorial ships an update every 3 months, SDR Receiver every 4 months. The most recent releases landed on September 24, 2026 and September 18, 2026 respectively.

## The numbers

| Metric | AVR Tutorial | SDR Receiver |
| --- | --- | --- |
| Price | **Free** | $9.99 |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/avr-tutorial/id1070496499/reviews)** | [4.1 (15 ratings)](https://appshunter.io/ios/app/sdr-receiver/id1289939888/reviews) |
| Number of ratings | 2 | **15** |
| Positive reviews | **75.0% of reviews** | 72.0% of reviews |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 3 months** | Every 4 months |
| Monetization | **Free with in-app purchases** | Paid |
| Size | 33 MB | 2 MB |
| Requires iOS | **9.0** | 17.0 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Siu Yuen Ho](https://appshunter.io/developer/814088527) | [Transition Technology Ventures, LLC](https://appshunter.io/developer/1289939887) |

## 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 |


### SDR Receiver

[App page](https://appshunter.io/ios/app/sdr-receiver/id1289939888)

This app demodulates and plays AM and FM radio signals received by compatible SDR hardware. It allows users to listen to various broadcasts, manage station lists, and adjust audio settings. Requires a separate radio and host computer for operation.

**Highlights:** Demodulate AM and FM signals, Manage station lists (import/export), Adjustable squelch and LNA gain, Adjustable audio filters, Signal strength indicator, AirPlay audio streaming, Lock Screen controls

**Features:** Vision Pro support

**In-app purchases:** none


## Frequently asked questions

### Is AVR Tutorial free?

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

### Is SDR Receiver free?

SDR Receiver costs $9.99, with no in-app purchases.

### Which has better reviews, AVR Tutorial or SDR Receiver?

AVR Tutorial is rated higher. AVR Tutorial averages 5.0 out of 5 from 2 ratings, while SDR Receiver averages 4.1 from 15 ratings.

### Do AVR Tutorial or SDR Receiver have ads?

Neither AVR Tutorial nor SDR Receiver shows ads.

### Which is updated more often, AVR Tutorial or SDR Receiver?

AVR Tutorial ships an update every 3 months, and SDR Receiver every 4 months. Most recently, AVR Tutorial was updated on September 24, 2026 and SDR Receiver on September 18, 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.*