Black Cat Systems

Want to display or send SSTV transmissions, without using a bulky computer? SSTV Pad lets you decode and display Ham (Amateur) Radio SSTV (Slow Scan T …

Spectrum Pad turns your iPad, iPhone, or iPod Touch into an audio spectrum analyzer. Frequencies up to 20 kHz can be displayed. You can control the di …

Looking for a way to play sound clips at a theater or sporting events, as a DJ, or at other events? Don’t want to lug a computer around with you? With …

SelCall generates Selective Calling Tones. Select your tone type from the extensive selection of available modes, then touch the button for each tone …

Want to monitor morse code transmissions, without using a bulky computer? Morse Pad lets you decode morse code on your iPad, iPhone, or iPod Touch. Ju …

Are you a ham radio operator or shortwave listener, in need of up to date propagation information and solar conditions? It features several propagatio …

Transmission Line Calc allows you to perform several calculations related to RF transmission Lines. After selecting from one of 47 different transmiss …

Field Strength Calc helps you determine the received strength of a transmitted signal. Enter in the transmitter power, antenna gains, distance, and fr …

Need to find the right bit size for a hole? Drill Calc calculates the correct drill bit size to use for threaded holes, based on the bolt (tap) diamet …

iFunctionGenerator turns your iPhone, iPad, or iPod Touch into an audio function generator. You can have up to 20 generators, each operating at a diff …