# Spectrum SDR (RTL vs nRF Matter

The clearest difference is in-app purchases: nRF Matter at none against Spectrum SDR (RTL's 1. Spectrum SDR (RTL's advantage is update cadence (every 11 days vs monthly). On price, ads, device support and iOS requirement there is nothing between them.

Both are free to download. Spectrum SDR (RTL sells 1 one-off in-app purchase. nRF Matter asks for nothing beyond the download.

Spectrum SDR (RTL ships an update every 11 days, nRF Matter monthly. The most recent releases landed on October 31, 2026 and November 3, 2026 respectively.

## The numbers

| Metric | Spectrum SDR (RTL | nRF Matter |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (2 ratings)](https://appshunter.io/ios/app/spectrum-sdr-rtl-sdr/id6764391865/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 100.0% of reviews | — |
| In-app purchases | Yes | **No** |
| Ads | No | No |
| Update frequency | **Every 11 days** | Monthly |
| Monetization | Free | — |
| Size | 7 MB | 85 MB |
| Requires iOS | 26.0 | 26.0 |
| Devices | **iPhone, iPad, Mac** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [James Mainwaring](https://appshunter.io/developer/1895761181) | [Nordic Semiconductor ASA](https://appshunter.io/developer/497679114) |

## What reviewers say

### Spectrum SDR (RTL

[App page](https://appshunter.io/ios/app/spectrum-sdr-rtl-sdr/id6764391865)

Explore radio signals with your RTL-SDR dongle. Listen to AM/FM/SSB/CW, view FFT and waterfall displays, and customize your experience. Requires a remote rtl_tcp instance over WiFi.

**Highlights:** Full frequency range support, AM, FM, SSB, CW reception, FFT and Waterfall displays, Adjustable sample rates, Bias tee and gain controls, Squelch functionality, Customizable display options

**Features:** Vision Pro support

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Full Version | $2.99 | one-time |


### nRF Matter

[App page](https://appshunter.io/ios/app/nrf-matter/id6786253679)

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

**In-app purchases:** none


## Frequently asked questions

### Is Spectrum SDR (RTL free?

Spectrum SDR (RTL is free to download, with in-app purchases available.

### Is nRF Matter free?

nRF Matter is free to download, with no in-app purchases.

### Do Spectrum SDR (RTL or nRF Matter have ads?

Neither Spectrum SDR (RTL nor nRF Matter shows ads.

### Which is updated more often, Spectrum SDR (RTL or nRF Matter?

Spectrum SDR (RTL ships an update every 11 days, and nRF Matter monthly. Most recently, Spectrum SDR (RTL was updated on October 31, 2026 and nRF Matter on November 3, 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.*