# iCluster - DX-Cluster database — For HAMs and SWLs

> Real-time DX-Cluster database access for amateur radio operators and shortwave listeners. (iPhone/iPad app by Marcus Roskosch.)

- Source: https://appshunter.io/ios/app/icluster-dx-cluster-database/id334053435 (this page in markdown: same URL + `.md`)
- Developer: [Marcus Roskosch](https://appshunter.io/developer/334053438)
- Category: Utilities
- Price: $5.99
- Rating: 4.10/5 from 10 App Store ratings · 57 written reviews indexed
- Age rating: 4+
- Requires: iOS 10.1 · 22 MB
- Languages: American English
- Released: 2009-10-31
- Data updated: 2026-08-19
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/icluster-dx-cluster-database/id334053435/reviews.md

## What is iCluster?

THE ORIGINAL DX-CLUSTER APP
iCluster is an iPhone and iPad App for HAMs, SWLs (Short wave radio listeners) or for everybody who want’s to know, what’s going on on the amateur radio frequencies.

This App is connecting the so called international DX-Cluster database in realtime. The results are analyzed and displayed in an easy to read overview.

The content can be filtered by frequency (e.g. 80m, 40m etc.) or mode (CW = Morse, Beacon or digital modes), Call Prefix, ITU/CQ Zone, Country and many more.

Calls (the callsign of the operators) will be decoded automatically by the App. This allows even inexperienced users to know the countries of the operators.

iCluster is an ideal tool for amateur radio operators for field days or contests. But also unlicensed users can use iCluster to find out the frequencies for their shortwave scanner or short wave radio receiver.

MAIN FEATURES:

■ Real time DX-Cluster database
■ Several pre-defined Cluster Servers
■ Easy to add your own Server (e.g. CW-Skimmer)
■ Several Filter and Filter combinations
■ Several Alarm settings
■ QRZ.com (Database!) lookup
■ QRZ.com website lookup
■ HamQTH lookup
■ Display whole cluster on a Map (Globe)
■ Display single Spot on a Map (Globe)
■ Shows distance and bearing from own location
■ iCloud Synchronization
■ UTC Clock
■ No HAM license or registering required

Take a look to the manual to find out more:

http://go-to.me/icluster-manual

This App exists since the App Store Exists as this was my first App. It has been continuously improved and re-written several times and is now available as Version 12, written in Swift 5. 

It's interesting to see how many other bad copies of my App are available on the App Store. If there is another DX-Cluster App, offering features my App is missing, just let me know. 

vy 73,
Marcus, DL8MRE

## Key features

- Real-time DX-Cluster database
- Multiple pre-defined and custom server options
- Advanced filtering by frequency, mode, call prefix, and zones
- Automatic call sign decoding
- Map display of DX spots with distance and bearing
- QRZ.com and HamQTH lookups
- iCloud synchronization

## Chart rankings

- #181 in Top Paid · Utilities (US App Store)

## Recent user reviews (10 of 57)

All indexed reviews: https://appshunter.io/ios/app/icluster-dx-cluster-database/id334053435/reviews.md

### 5/5 — ICluster

*2022-06-02*

Sehr gute App, einfach zu bedienen, nutze sie auch gerne unterwegs.

### 5/5 — Perfekt

*2022-05-01*

Endlich eine App mit der ich auch Filter in den Kommentaren setzen kann und somit mich über  über WCA Spots benachrichtigen lassen kann.. Danke

### 5/5 — 👍

*2021-04-07*

TOP ‼️

### 1/5 — Poor software support for telnet password authentication

*2021-03-25*

This software lacks the reliability and ability for a secured login to a server with a password.  The developer seems not to understand the gravity of internet security and refuses to work with me as a fellow customer and developer to solve any issues. Just says “oh, it works for me.”  

AVOID THIS SOFTWARE!

### 5/5 — Klasse App

*2020-01-01*

Übersichtlich, gut zu bedienen und toll gemacht...

### 3/5 — Needs update

*2016-10-05*

Needs update

### 3/5 — Stopped working

*2015-12-24*

Perhaps since the most recent update, this program has stopped working. Pinwheels, crashes, locks up. Had been great in past.

### 1/5 — Something is not working

*2015-05-03*

If you tap on the filter icon, and select a filter parameter, you cannot get back to the main page. Period. You have to shut the application down and then open it again. And guess what? The filter you selected before you shut down the application is, yes, unselected. This bug makes the application essentially unusable.

**Developer response:** Since this bug has been fixed shortly after reporting, please consider updating your review. Thank you. 73, Marcus, DL8MRE

### 4/5 — iCluster works on iPad

*2015-03-06*

iCluster works on my iPad.  When in settings, I need to be in portrait view to see all the buttons.  Then switch back to landscape or stay with portrait view if you prefer.

### 2/5 — Locks up my iPad

*2015-01-22*

Locks up the iPad most times I use it.

**Developer response:** Since this bug has been fixed shortly after reporting, please consider updating your review. Thank you. 73, Marcus, DL8MRE

## Frequently asked questions about iCluster

### What does iCluster do?

iCluster connects to the international DX-Cluster database in real-time, providing an easy-to-read overview of amateur radio activity. It allows users to see what's happening on amateur radio frequencies, filter information, and decode call signs.

### What are the main features of iCluster?

Key features include real-time DX-Cluster database access, multiple server options, advanced filtering by frequency, mode, and location, automatic call sign decoding, map display of DX spots, and lookups on QRZ.com and HamQTH.

### How much does iCluster cost?

iCluster is a paid application. There are no in-app purchases or advertisements mentioned in the description, indicating a one-time purchase for the full functionality.

### Is iCluster compatible with my device?

The app is designed for iPhone and iPad, suggesting compatibility with Apple's iOS operating system. It has been continuously improved and is available as version 12, written in Swift 5.

### Who can use iCluster?

iCluster is ideal for amateur radio operators (HAMs) and shortwave radio listeners (SWLs). It's also useful for unlicensed users who want to find frequencies for their shortwave scanners or receivers. No HAM license or registration is required to use the app.

## Version history (last 5 releases)

### 12.0.2 — 2019-04-30

This update fixes a few Filter and Alarm bugs, contains some new DX Cluster servers and an update Callprefix database.

vy 73,
Marcus, DL8MRE

### 11.1.1 — 2018-02-15

Some bug fixes for the filter section and cluster servers that require a callsign to login (such as DB0SUE).

vy 73,
Marcus, DL8MRE

### 11.0.2 — 2017-12-08

This update contains a few bug fixes of the filter section.

73,
Marcus, DL8MRE

### 11.0.1 — 2017-10-25

- iOS 11 adaptions
- Adaptions for the new iPhone models
- Fixed a bug where it was only possible to use four digits for the home QTH
- Improved Map display
- Some minor improvements

### 10.0.02 — 2017-03-20

- Further improved Filters
- Now, for your convenience, you can switch to a new Simple Filter Mode
- Better support for small displays (e.g. iPhone SE)
- Improved custom Cluster Server support

Please don't forget to rate iCluster - thank you so much!

vy 73,
Marcus, DL8MRE

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## More apps by Marcus Roskosch

- [Electronic Toolbox Pro](https://appshunter.io/ios/app/electronic-toolbox-pro/id339158729)
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- [SamacSys](https://appshunter.io/ios/app/samacsys/id1454509750)
- [SDR-Control for Icom](https://appshunter.io/ios/app/sdr-control-for-icom/id1614141094)

All apps by Marcus Roskosch: https://appshunter.io/developer/334053438

## Related topics

[mircules dx cluster](https://appshunter.io/ios/topics/mircules-dx-cluster) · [dx cluster](https://appshunter.io/ios/topics/dx-cluster)

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-19.*