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.
1.10
September 11, 2026
Audio now continues to play when app is in background.
$2.99
Full Version
All features unlocked and no adverts!
Glad you like it 😊
Spectrum SDR can be installed on an iPhone, iPad, or Apple Silicon Mac. It supports a range of Apple devices, leveraging their hardware capabilities for signal reception.
Yes, Spectrum SDR requires an RTL-SDR dongle to function. It also needs to be connected to an instance of rtl_tcp running on a remote computer, typically over WiFi.
Spectrum SDR supports AM and FM (wide and narrow), SSB, and CW radio signals. This allows for a wide range of listening experiences.
The latest version of Spectrum SDR is 1.9, released on August 31, 2026. Updates are provided regularly to enhance functionality and reliability.
Spectrum SDR has an age rating of 4+. This indicates it is suitable for a broad audience, including younger users interested in radio technology.
No, Spectrum SDR does not contain advertisements. Users can enjoy an ad-free experience while exploring radio signals.
Spectrum SDR offers flexible display options, including FFT and Waterfall displays, allowing users to visualize signal data. You can also hide elements you don't need to see.
Spectrum SDR has received a perfect rating of 5.0 stars from 1 rating, indicating a highly positive user sentiment among its early adopters.
