Spectrum SDR (RTL-SDR)
Software Defined Radio
Free · In‑App Purchases
This application is about having a bit of fun with those amazing little RTL-SDR dongles, whilst listening to AM/FM/SSB/CW radio signals. It's nice and easy to use so why not give it a try?
- Covers the full frequency range of your RTL-SDR dongle.
- AM and FM, wide and narrow, SSB, CW.
- FFT and Waterfall displays.
- Sample rates 240000 Hz to 2160000 Hz.
- Bias tee control.
- 75 presets over 5 pages.
- Gain controls.
- Squelch.
- Flexible display options, hide things you don't need to see.
- Built-in help.
The application needs to be connected to an instance of rtl_tcp running on a remote computer, most likely over WiFi. You will need a good network connection for this to work reliably when using the higher sample rates.
It can be installed on an iPhone, iPad or Apple Silicon Mac.
We hope you enjoy using this application.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Add new button to toolbar to allow frequency to be entered and fix bug where too many controls were hidden when hiding level meters.
The developer, James Mainwaring, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- James Mainwaring
- Size
- 7.2 MB
- Category
- Utilities
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - iPad
Requires iPadOS 26.0 or later. - Mac
Requires macOS 26.5 or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Contains
Advertising
- In-App Purchases
Yes
- Full Version $2.99
- Copyright
- © 2026 James Mainwaring