A slightly different app from the usual ones I post on, but it is free and might be fun to play with. Here’s the description:
Monolith Loop is an escape from the pressures of modern life, if for just a little while, to share in a peaceful little world of zen.
Like dropping musical pebbles in a pond, the ripple moves outward and chimes when they collide, reflecting back on themselves in an ever-repeating pattern. Create ambient or melodic loops without any knowledge of music whatsoever and share them seamlessly on Twitter.