Black Cat Systems

Sound Byte

Trial version

Setup a sound effects and radio station cart machine.

SSTV Slow Scan TV

Paid

Want to display or send ssTV transmissions, without using a bulky computer?

Atomic PC

Trial version

Learn and improve your knowledge on atomic elements and its various forms.

Knitting Wizard

Trial version

Create custom knitting grids and diagrams.

Function Generator Pad

Paid

Function Generator Pad turns your iPad into an audio function generator and an audio sweep generator.You can have up to 13 generators, each...

Sound Byte Cart Machine App

Paid

Looking for a way to play sound clips at a theater or sporting events, as a DJ, or at other events? Dont want to lug a computer around with you?...

RF Toolbox

Paid

Determines ham radio antenna design parameters

HF Weather Fax

Paid

Receive marine weather radiofascimile transmissions on your Android device.

Knitting Wizard

Paid

create your own custom knitting grids & diagrams

MultiMode

Paid

tool for morse, RTTY, FAX, SSTV & other ham radio modes

Graffikon (Classic)

Paid

create custom pdf files, containing text & shapes

Elmer

Trial version

Prepare for written ham radio exams with simple tests.

Packet Pad

Paid

Packet Pad lets you view Packet Radio transmissions on your iPad, iPhone and iPod Touch. Just set it next to your radio, tune in a Packet...

Morse Mania

Trial version

Morse code tutor helps to read & write morse code.

Black Cat HF Weather Fax

Trial version

Tune your shortwave radio to a weather fax transmission.

PSK31

Paid

Want to monitor PSK31 transmissions, without using a bulky computer? PSK31 lets you view ham radio PSK31 transmissions on your iPad. Just set your...

NAVTEX Decoder

Paid

Are you on a ship? Do you need to be able to receive up to date weather and marine safety transmissions?NAVTEX Decoder lets you view NAVTEX marine...

DX ToolBox

Trial version

Get information about geomagnetic conditions of the world.

Audio Toolbox

Trial version

Produce sound effects and tune musical instruments.

Atomic Mac

Paid

periodic table with detailed physical/nuclear info

RF Toolbox

Trial version

Design several types of antennas.

Selcall Tone Generator

Paid

Generate selective calling tones.

iUnit

Paid

conversions for 1500+ measurement units & currencies

Graffikon

Trial version

Create custom ODF files.