Spectrum SDR (RTL-SDR)
Software Defined Radio
0 ratings
Free
In-App Purchases
About
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.
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What's New in Spectrum SDR (RTL
1.6
July 14, 2026
- FFT has central red line to clearly indicate the tuned frequency. - FFT has a shaded region showing the extent of the current demodulator's filter. - Zoom feature and adjustable tuning rate give improved user experience, particularly when tuning to very narrow signals.
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In-App Purchases
$2.99
Full Version
All features unlocked and no adverts!