Demod: SDR Receiver
Shortwave, HF & ham radio
$9.99 · Designed for iPad. Not verified for macOS.
Now with rewind, recording, live on-device transcription & translation, a smart scanner, and one-tap signal identification. Browse public servers and start listening.
Demod turns your iPhone and iPad into a world-class shortwave radio — tuning live software-defined receivers around the globe.
Connect to public SpyServer and rtl_tcp servers over Wi-Fi or cellular and listen in real time: shortwave broadcasters, ham radio, aircraft, marine, time signals, and more. No antenna or extra hardware required.
FEATURES
• Connect to SpyServer, rtl_tcp, and KiwiSDR receivers
• Smooth, Metal-powered waterfall and spectrum display
• AM, FM, USB, LSB, and CW with adjustable bandwidth
• Built-in decoders: CW (Morse), RTTY, PSK31, and FT8
• Fast, tactile tuning with a large frequency dial
• Save your favorite stations and frequencies
• Noise blanker and hum notch for cleaner audio
• AirPlay to HomePod, speakers, or headphones
• Native on both iPhone and iPad
Whether you're a licensed ham, a shortwave listener, or just curious what's drifting around the radio spectrum, Demod puts a real SDR in your pocket.
• KiwiSDR support — connect to KiwiSDR HF web receivers, with live audio and waterfall streamed straight from the server. Great for shortwave and the ham
HF bands when you don't have your own antenna up.
• Browse public receivers worldwide — now on a station map as well as a list
• Time-Shift — pause and rewind live radio (about 3 minutes of DVR buffer)
• Record what you hear, with a pre-roll of the moment you tapped Record
• Live Text — on-device transcription of the audio, with on-device translation of the captions (iOS 18+) and a full-screen transcript reader
• Identify — tap the new button on the waterfall to ask "what is this signal?"
• Scanner — scan memories, a band range, or let Smart scan find active signals
• Noise reduction (spectral DNR), noise blanker, and mains-hum notch
• Decoders (beta) for CW, RTTY, PSK31, and FT8 — FT8 uses a much more sensitive decoder that pulls far more signals out of a busy band
• Redesigned controls: five focused tabs instead of one long list
• Audio now resumes automatically after phone calls and Siri
• Many robustness and stability fixes throughout
The developer, Alphonse Romero, 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
- Alphonse Romero
- Size
- 4.7 MB
- Category
- Utilities
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © Alphonse Romero

