iSDR

iSDR

A Software Defined Radio App

11 ratings
58 reviews
$0.99
In-App Purchases

Details

  • Released
  • Updated
  • November 18, 2011
  • November 25, 2019

Features

iSDR screenshot #1 for iPhone
iSDR screenshot #2 for iPhone
iSDR screenshot #3 for iPhone
iSDR screenshot #4 for iPhone
iSDR screenshot #5 for iPhone
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About

This app allows experimenters and amateur radio enthusiasts to build a portable software-defined radio receiver using their iOS device. It processes radio signals using the device's processor and offers various display and filtering modes. Additional hardware is required for live signal reception.

Six receive mode settings (USB, LSB, CW, AM, FM, Binaural)
Selectable bandwidth settings
120 dB dynamic range signal strength meter
Three AGC settings (fast, slow, off)
Spectrum, Waterfall, and Oscilloscope display modes
Supports downloaded audio-format spectrum files via iTunes
Embed center frequency in file names for automatic display
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What's New in iSDR

5.1

November 25, 2019

o Fixes a crash when using native Settings o Provides WiFi functionality without in-app purchase o Updates for iOS 9 and above o Support for iPhone 11 and iPad Pro

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1

In-App Purchases

Free

Wi-Fi Radio Control

Provides iSDR the ability to connect to a Wi-Fi radio control interface for wireless control of the frequency setting of a compatible radio. NOTICE: Additional hardware is required. See http://wifi.digitalconfections.com

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User reviews

Unsupported OUT OF DATE

Unsupported. Last update years ago. Website out of date and does not answer emails. It would be useful if updated. Falsely claims to be the only add program for iPhones and iPads. See SDR RECEIVER and peel-SDR received in the AppStore.

Junk

This is junk. Will not work at all. Just get a blank black screen. Would like my money back

Belka DX panadapter... Excellent!

Have a Belka DX spy radio and can feed the iq output through irig HD2 to the software to create a panadapter visual interface on my iPhone.
All other SDR require dongle and server this removes this into one very small neat package but needs power as the irig chews phone battery.
The app could have a few improvements as it can be clunky but nothing on market to match it at moment
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Very useful!

Exactly what I was looking for. I plan to use this app with KX2, QCX, and QSX in the future. Although I currently have none of these radios, the demo file gives me a very good understanding of what this app can do. Mind blown with the sdr/dsp stuff.

Outdated

I wish the developer would release an update with iPhone X display support. Goes to show how long it’s been since this app was updated.

It’s nice to see my Xiegu G90’s waterfall on a larger screen (the radio only has a 1.8” display), but frustrating knowing it could be larger still.

Developer apps

FAQ

What is iSDR and what does it do?

iSDR is a software-defined radio receiver application for iPhone, iPod touch, and iPad. It allows users to process radio signals using their iOS device's processor, offering features like frequency domain filtering, various receive modes, and signal display options. It is designed for experimenters and amateur radio enthusiasts.

Do I need any extra hardware to use iSDR?

Yes, additional hardware is required to receive live signals. You will need to purchase or construct a "quadrature sampling detector (QSD)" RF front-end device and connect it between an antenna and the microphone input jack. Alternatively, it can be used as a panadapter with a compatible radio receiver.

Can I use iSDR with RTL-SDR dongles?

No, iOS devices will not work with RTL-SDR USB dongles, and they are not supported by iSDR. The app is designed to work with specific QSD RF front-end devices or as a panadapter for compatible radio receivers.

How can I load my own radio recordings into iSDR?

You can load your own I/Q recordings into the app using iTunes file sharing. Most PCM file formats are supported, including .wav and .caf. If you embed the center frequency in your file names, iSDR will automatically display the correct frequency when the file is played.

What are the key features of iSDR?

Key features include six receive modes (USB, LSB, CW, AM, FM, Binaural), selectable bandwidths, a 120 dB signal strength meter, three AGC settings, and three display modes (Spectrum, Waterfall, Oscilloscope). It also supports downloaded spectrum files and allows for quick or precise tuning.