Developer Erik Sigth has introduced Nils, a real-time bitcrusher, sampler and looper for iOS.
Here’s what he has to say about Nils:
Nils is a real time sound effect machine with a minimalistic looper. It comes with bitcrush, delay and gain for distortion. As input you can use the internal microphone, your earpods or accessories like iRig. Can also be used as a sampler, by holding the delay buffer and changing its phase. Lo-fi looping for both beginners and professionals.
Shuriken, creator of “sonic weapons for the music-ninja”, has introduced BitTest, a free audio effect for Macs:

