---
title: "iSDR - Bewertungen, Einnahmen und Downloads in Vereinigtes Königreich | Apple App Store"
description: "PLEASE READ THE ENTIRE DESCRIPTION BEFORE PURCHASING. iSDR is the first and only software-defined radio application compatible with the Apple iPhone®, iPod touch® and iPad™. iSDR is for experimenters "
---

# iSDR — Vereinigtes Königreich
> A Software Defined Radio App

![iSDR App Icon](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/39/de/c7/39dec708-4307-28e5-729e-830207613e1f/AppIcon-0-0-1x_U007emarketing-0-0-0-10-0-85-220.png/434x0w.png)

**Developer:** [Digital Confections](https://apptail.io/de/developer/digital-confections-XXPb)
**Category:** Education
**Rating:** 5.0/5 (2 ratings)
**Price:** Free
**Bundle ID:** com.digitalconfections.iSDR1
**Store:** Apple App Store
**Country:** Vereinigtes Königreich
**Version:** 5.1 (released 2019-11-25)
**Original Release:** 2011-11-18
**Languages:** English

**App Store Link:** [Download on Apple App Store](https://apps.apple.com/gb/app/app/id480077371)
**AppTail Page:** [https://apptail.io/de/app/isdr-YbLd/united-kingdom](https://apptail.io/de/app/isdr-YbLd/united-kingdom)

## iSDR Description
PLEASE READ THE ENTIRE DESCRIPTION BEFORE PURCHASING. iSDR is the first and only software-defined radio application compatible with the Apple iPhone®, iPod touch® and iPad™. iSDR is for experimenters and amateur radio enthusiasts looking to construct a truly portable software-defined radio receiver. Additional hardware is required to receive live signals. Currently, iOS devices will not work with RTL-SDR USB dongles, and they are not supported by iSDR.

PLEASE NOTE: Receiving live on-air signals using iSDR requires purchasing or constructing a "quadrature sampling detector (QSD)" RF front-end device, and connecting it between an antenna and the microphone input jack. Alternatively, iSDR can be used to implement a panadapter for use with a compatible radio receiver. Without a QSD RF front-end or a connected radio, iSDR will only play I/Q recordings of actual radio signals. Additional recordings can be loaded into the app using iTunes file sharing - some recordings are available free to download from the Internet. Visit the support web site for more information.

iSDR includes a sample I/Q recording featuring 30 seconds of a ham radio contest. This is for demonstration purposes only. It is not meant to fool you! It is to allow you to experience how the app works without having to do anything yourself: just turn it on. You can download and play your own files if you like. Please see the support page for details. AND PLEASE contact us directly if you experience any issues with using this app. We will respond promptly when provided with details.

When iSDR is used to receive live radio signals, receiver performance will depend largely on the quadrature sampling detector and antenna that you use.

iSDR is a software-defined receiver application for use on mobile handset devices and iPad. Despite its extreme portability, the app utilizes the same digital signal processing techniques found in PC-based SDR receivers. It does frequency domain filtering using a theoretical "brick wall" sinc filter algorithm to provide steep and deep bandpass filtering. iSDR doesn't utilize any DSP hardware but instead uses the iOS device's processor to implement DSP algorithms.

Features

o Six receive mode settings: USB, LSB, CW, AM, FM* and Binaural.
o Selectable bandwidth settings for each mode.
o Signal strength meter covering 120 dB of dynamic range with peak and average power indication.
o Three AGC settings: fast, slow, and off.
o Three display modes: Spectrum, Waterfall and Oscilloscope.
o File sharing** supports downloaded audio-format spectrum files synced using iTunes.
o Most PCM file formats are supported, including .wav and .caf.
o Embed the center frequency in your file names and iSDR will automatically display the correct frequency!
o Tune quickly using a single touch to the display screen, or tune precisely using the rainbow tune bar.
o Change radio settings with a simple double-tap action to the red cursor, mode text, AGC indicator or signal grid!
o Up to 44.1 kHz of available spectrum bandwidth.
o Dimmable semi-log or linear spectrum grid (native Settings app only).
o Adjustable CW offset (native Settings app only).
o Monaural microphone input automatically adjusts the display to 22 kHz bandwidth.
o Automatically detects if external audio is available for receiving live signals (menu selectable).
o Reverse I/Q stereo input logic (menu selectable).

*FM mode is not supported for monaural signals, and will not appear as a mode selection unless stereo audio (live or recorded) is available. Narrowband FM only: 16 kHz or 11.2 kHz bandwidth.

Please contact Digital Confections with your questions and suggestions!

## iSDR Screenshots
- [Screenshot 1](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/93/23/5d/93235dcb-67fd-fbbc-f850-2f685f6be575/mzl.dbmcytfi.png/960x640.png)
- [Screenshot 2](https://is1-ssl.mzstatic.com/image/thumb/Purple123/v4/15/48/e9/1548e91b-3676-5489-743e-d99bfb9970ad/mzl.yssdwbtl.png/960x640.png)
- [Screenshot 3](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/cf/96/35/cf9635e9-498f-4a97-950c-174cbef43e8a/mzl.utfzjeec.png/960x640.png)
- [Screenshot 4](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/f2/b8/9a/f2b89a58-eccd-e745-caf5-5f85e1bb3a62/mzl.kxklwzrj.png/960x640.png)
- [Screenshot 5](https://is1-ssl.mzstatic.com/image/thumb/Purple113/v4/57/18/bc/5718bc6d-f0db-d3ae-5d2b-4cdc1772fc2d/mzl.usurqsqf.png/960x640.png)

## iSDR Rating Breakdown in Vereinigtes Königreich
- 5 stars: 2 (100%)
- 4 stars: 0 (0%)
- 3 stars: 0 (0%)
- 2 stars: 0 (0%)
- 1 stars: 0 (0%)

## iSDR Reviews in Vereinigtes Königreich

### ***** "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
-- captain-jon, 2022-03-15

### **--- "ISDR"
Disappointing performance, as I had to buy a fairly expensive sound card to make it work with my radio, and then I found it allowed no control of the radio and a very limited range on screen which needs to be reset when tuning through the band.

Of only limited use and not worth the effort. Spend out on a proper pan-adaptor.
Les
-- Gonmd, 2016-07-01

### *---- "Oops. Really wanted this to work on my ipad."
So, I paid £0.79 to take a look. Free would have been enough .. & left me more willing to pay more for a working app? No thanks.
-- UK_NCCE, 2015-08-24

### ***** "Works great, G8OFA"
Brilliant with KX3 and iPad Air
-- G8OFA, 2013-12-24

### **--- "ISDR failed"
Update has failed-Still installing one day later-cannot stop install???
-- G4BTI, 2013-09-14

### ***** "Great app"
Charles has done a great job writing this app.
I have been using it for the last three years.
The Line 6 Mobile In is the best to get the I/Q audio in to your iPhone, iPad and iTouch.

Philip g7jur.
-- g7jur, 2013-04-09

### *---- "why"
ok so i mite be missing the point of this app but its just a sample that does not update ,ok so i understand you need extra equipment to get live radio ,,,but i would expect to get new recordings of live radio ,not just a sample ,,so what is the point of this app
-- cooking apple, 2013-03-25

### ***** "Great App"
Would this app be able to use the streams from online SDRs eg like those from the University of Twente ?
-- ThatReggD, 2013-02-22

### ***** "Fantastic"
This is a fantastic application, highly recommend it, thank you very much.   Nice presentation and works a treat!
-- Uglyspud, 2012-11-12

### ***** "Awesome"
It's incredible how good this app is. Ease of use and completeness, you can even learn new things since it comes with a sample file attached and instructions.
Greetings and keep up with the good work!
-- Sonixant, 2012-10-05

### ***** "Great app, works perfectly"
I was surprised to find how good this app is and so easy to use. Thank you for a great app. G7PAL
-- HarryHorse, 2012-09-02

### ****- "Rf front end"
Hi where can I purchase a suitable RF front end?? Thanks
-- Mabz1, 2012-08-05

### ***** "Deserves 6 Stars if not more"
A really superb client for iOS devices I hope that you can continue to develop this App But congratulations on getting this onto the App Store. it has already become one of my favorite apps along with WaveGuide. Keep up the good work.
-- TechB, 2012-06-28

[View all iSDR reviews and detailed analytics on AppTail](https://apptail.io/de/account/signup?utm_campaign=ai-crawl&utm_content=reviews)


## iSDR Store Rankings
| Chart | Country | Category | Rank |
|-------|---------|----------|------|
| Top Bezahlt | Brasilien | Education | #51 |
| Top Bezahlt | Griechenland | Education | #150 |
| Top Bezahlt | Algerien | Education | #168 |
| Top Bezahlt | Polen | Education | #201 |
| Top Bezahlt | Argentinien | Education | #230 |
| Top Bezahlt | Italien | Education | #253 |
| Top Bezahlt | Spanien | Education | #254 |
| Top Bezahlt | Finnland | Education | #258 |
| Top Bezahlt | Ungarn | Education | #272 |
| Top Bezahlt | Portugal | Education | #288 |
| Top Bezahlt | Tschechien | Education | #332 |
| Top Bezahlt | Niederlande | Education | #368 |
| Top Bezahlt | Ukraine | Education | #382 |
| Top Bezahlt | Russland | Education | #391 |
| Top Bezahlt | Österreich | Education | #412 |
| Top Bezahlt | Kasachstan | Education | #436 |
| Top Bezahlt | Belgien | Education | #464 |
| Top Bezahlt | Türkei | Education | #481 |


## Apps Similar to iSDR
- [RST Decoder Pro](https://apptail.io/de/app/rst-decoder-pro-RjMb/united-kingdom)
- [Ham Morse](https://apptail.io/de/app/ham-morse-TXCc/united-kingdom)
- [Morse Words](https://apptail.io/de/app/morse-words-bNZc/united-kingdom)
- [ARRL magazines](https://apptail.io/de/app/arrl-magazines-eznd/united-kingdom)
- [Amateur Radio Toolkit](https://apptail.io/de/app/amateur-radio-toolkit-iznd/united-kingdom)
- [ScopeBoss](https://apptail.io/de/app/scopeboss-ecLd/united-kingdom)
- [HAM Test Prep Lite:  Extra](https://apptail.io/de/app/ham-test-prep-lite-extra-WRAe/united-kingdom)
- [HamExam+](https://apptail.io/de/app/hamexam-gSAe/united-kingdom)
- [DX Spots](https://apptail.io/de/app/dx-spots-aEqf/united-kingdom)
- [SatNOGS](https://apptail.io/de/app/satnogs-jxil/united-kingdom)

## iSDR Available In
- [Vereinigte Staaten](https://apptail.io/de/app/isdr-YbLd/united-states)
- [Italien](https://apptail.io/de/app/isdr-YbLd/italy)
- [Niederlande](https://apptail.io/de/app/isdr-YbLd/netherlands)
- [Brasilien](https://apptail.io/de/app/isdr-YbLd/brazil)
- [Vereinigtes Königreich](https://apptail.io/de/app/isdr-YbLd/united-kingdom)
- [Russland](https://apptail.io/de/app/isdr-YbLd/russia)
- [Spanien](https://apptail.io/de/app/isdr-YbLd/spain)
- [Japan](https://apptail.io/de/app/isdr-YbLd/japan)
- [Deutschland](https://apptail.io/de/app/isdr-YbLd/germany)
- [Norwegen](https://apptail.io/de/app/isdr-YbLd/norway)
- [Türkei](https://apptail.io/de/app/isdr-YbLd/turkey)
- [Australien](https://apptail.io/de/app/isdr-YbLd/australia)
- [Frankreich](https://apptail.io/de/app/isdr-YbLd/france)
- [China](https://apptail.io/de/app/isdr-YbLd/china)
- [Ungarn](https://apptail.io/de/app/isdr-YbLd/hungary)
- [Schweden](https://apptail.io/de/app/isdr-YbLd/sweden)
- [Algerien](https://apptail.io/de/app/isdr-YbLd/algeria)
- [Ecuador](https://apptail.io/de/app/isdr-YbLd/ecuador)
- [Ägypten](https://apptail.io/de/app/isdr-YbLd/egypt)
- [Finnland](https://apptail.io/de/app/isdr-YbLd/finland)
- [Grenada](https://apptail.io/de/app/isdr-YbLd/grenada)
- [Griechenland](https://apptail.io/de/app/isdr-YbLd/greece)
- [Sonderverwaltungsregion Hongkong](https://apptail.io/de/app/isdr-YbLd/hong-kong)
- [Kroatien](https://apptail.io/de/app/isdr-YbLd/croatia)
- [Indonesien](https://apptail.io/de/app/isdr-YbLd/indonesia)
- [Irland](https://apptail.io/de/app/isdr-YbLd/ireland)
- [Israel](https://apptail.io/de/app/isdr-YbLd/israel)
- [Indien](https://apptail.io/de/app/isdr-YbLd/india)
- [Island](https://apptail.io/de/app/isdr-YbLd/iceland)
- [Südkorea](https://apptail.io/de/app/isdr-YbLd/south-korea)
- [Kuwait](https://apptail.io/de/app/isdr-YbLd/kuwait)
- [Kasachstan](https://apptail.io/de/app/isdr-YbLd/kazakhstan)
- [Libanon](https://apptail.io/de/app/isdr-YbLd/lebanon)
- [Sri Lanka](https://apptail.io/de/app/isdr-YbLd/sri-lanka)
- [Litauen](https://apptail.io/de/app/isdr-YbLd/lithuania)
- [Lettland](https://apptail.io/de/app/isdr-YbLd/latvia)
- [Mexiko](https://apptail.io/de/app/isdr-YbLd/mexico)
- [Malaysia](https://apptail.io/de/app/isdr-YbLd/malaysia)
- [Nigeria](https://apptail.io/de/app/isdr-YbLd/nigeria)
- [Neuseeland](https://apptail.io/de/app/isdr-YbLd/new-zealand)
- [Peru](https://apptail.io/de/app/isdr-YbLd/peru)
- [Philippinen](https://apptail.io/de/app/isdr-YbLd/philippines)
- [Pakistan](https://apptail.io/de/app/isdr-YbLd/pakistan)
- [Polen](https://apptail.io/de/app/isdr-YbLd/poland)
- [Portugal](https://apptail.io/de/app/isdr-YbLd/portugal)
- [Rumänien](https://apptail.io/de/app/isdr-YbLd/romania)
- [Saudi-Arabien](https://apptail.io/de/app/isdr-YbLd/saudi-arabia)
- [Singapur](https://apptail.io/de/app/isdr-YbLd/singapore)
- [Slowenien](https://apptail.io/de/app/isdr-YbLd/slovenia)
- [Thailand](https://apptail.io/de/app/isdr-YbLd/thailand)
- [Tunesien](https://apptail.io/de/app/isdr-YbLd/tunisia)
- [Taiwan](https://apptail.io/de/app/isdr-YbLd/taiwan)
- [Ukraine](https://apptail.io/de/app/isdr-YbLd/ukraine)
- [Vietnam](https://apptail.io/de/app/isdr-YbLd/vietnam)
- [Vereinigte Arabische Emirate](https://apptail.io/de/app/isdr-YbLd/united-arab-emirates)
- [Südafrika](https://apptail.io/de/app/isdr-YbLd/south-africa)
- [Armenien](https://apptail.io/de/app/isdr-YbLd/armenia)
- [Argentinien](https://apptail.io/de/app/isdr-YbLd/argentina)
- [Österreich](https://apptail.io/de/app/isdr-YbLd/austria)
- [Aserbaidschan](https://apptail.io/de/app/isdr-YbLd/azerbaijan)
- [Belgien](https://apptail.io/de/app/isdr-YbLd/belgium)
- [Brunei Darussalam](https://apptail.io/de/app/isdr-YbLd/brunei)
- [Belarus](https://apptail.io/de/app/isdr-YbLd/belarus)
- [Kanada](https://apptail.io/de/app/isdr-YbLd/canada)
- [Schweiz](https://apptail.io/de/app/isdr-YbLd/switzerland)
- [Chile](https://apptail.io/de/app/isdr-YbLd/chile)
- [Kolumbien](https://apptail.io/de/app/isdr-YbLd/colombia)
- [Zypern](https://apptail.io/de/app/isdr-YbLd/cyprus)
- [Tschechien](https://apptail.io/de/app/isdr-YbLd/czechia)
- [Dänemark](https://apptail.io/de/app/isdr-YbLd/denmark)
- [Dominikanische Republik](https://apptail.io/de/app/isdr-YbLd/dominican-republic)

---

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