Completely redesigned decoder!Turns your iPhone into a simple DTMF decoder. Simply hold the iPhone's microphone near to a clear source of DTMF tones (telephone "Touch Tones") and it will display the numbers being dialled. A row of LEDs indicate which frequencies are present in the signal - each LED corresponds to a single frequency.See it in action here:
File Size503.13 kB
Operating System iOS
System RequirementsCompatible with iPhone, iPod Touch, and iPad. Requires iOS 3.1 or later. iTunes account required