iCluster - DX-Cluster database 4+

For HAMs and SWLs

Marcus Roskosch

    • 4.3 • 7 Ratings
    • $2.99



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.


■ 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:


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

What’s New

Version 12.0.2

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

vy 73,
Marcus, DL8MRE

Ratings and Reviews

4.3 out of 5
7 Ratings

7 Ratings

VetteSteve ,

Great mobile ham App

This is a must have App for mobile Ham. The new filtering feature allows you to only see spots from spotters in your region, as well as a bunch of other options. I was looking for that feature in a cluster. Qrz integration is cool too.

Only wish there was a logging program integrated That way I wouldn't have to switch back and forth between Apps.

Atgtechs ,

Poor software support for telnet password authentication

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.”


wa3tre ,

Really Nice App

Great app for checking the band. Works well and is fast on a WiFi connection. Would have given 5 Stars if you could filter the spots by your country. Looking at a bunch of spots submitted by DX amateurs, does not let me know what we are hearing stateside. This is also true if the spots are all by USA hams, DX will not know what their area is hearing.

App Privacy

The developer, Marcus Roskosch, 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.

Privacy practices may vary, for example, based on the features you use or your age. Learn More


  • Family Sharing

    Up to six family members can use this app with Family Sharing enabled.

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