Monolith Loop works off of the same “pebble ripple” principle as Brian Eno’s Bloom and several other apps, but the ripples bounce off of each other a bit differently. There’s only one tone, adjustable by pitch and resonance. It’s pleasing enough, and can be further configured in six “moods” (Major, Minor, Raga, Egypt, Insen and Bali).
One thing I’d like to see is some MIDI sync (or tempo value entry) for this app because it can set up interesting rhythms, but it’s hard to sync anything else with Monolith. I tried using tap tempo in Ableton, and inevitably the iPad and DAW end up out of sync before long.
Purchasing the app allows saving, which is nice for composing, but just as a generative app it is great for randomness. A sleep timer is available for yet another extra charge.
Here’s a short improv: