I love the Aguilar Tone Hammer because it only focuses on a few things, and does them very well. There is no software, or app: you plug in your bass, and sound comes out on the other end. It just so happens that the sound is utterly fantastic: I tried it with active and passive basses. The hi-gain mode is particularly distinctive. I don't know how this compares to SansAmp, but now that I have it, I am never going to part with it.