iJDSP App enables mobile simulation and visualization of Digital Signal Processing (DSP) concepts and algorithms on iOS devices such as the iPhone, iPod Touch, and iPad. This app has been developed for education purposes at the SenSIP Center, ASU. iJDSP has a rich suite of DSP functions including FIR and IIR filter design algorithms, FFT, plot functions, z-plane, and graphical convolution computations.