soft peal is a collection of little physics machines you can listen to. pendulums swing, rain falls, planets orbit, springs bob, arcs slide, and cradles pass their swing down the line. every strike plays a note. each machine drifts apart into patterns, then lines back up, once per cycle. you can watch the whole journey or just leave it on and listen. seventeen shapes across six machines, and each one sounds different. the geometry is the music. tight passages strike louder. deep floors ring lower. nothing is random, and nothing ever falls out of tune. make it yours: - sixteen instruments, from glass and music box to gong and singing bowl, tunable a full octave up or down - ten color palettes, four backgrounds, and two styles: soft glow or crisp solid - glow, trails, speed, and how many balls are in the machine made for winding down: - sleep timer that fades the sound out gently - plays through the silent switch, or not. your choice - mixes politely with your podcasts and music share what you make: - export any scene as a video with sound. rendered, not screen-recorded - "one loop" exports a perfect seamless loop for posting the triangle is free, with all seven bright instruments, both visual styles, and full control of motion and volume. one small purchase unlocks everything else: no subscription, no ads, no account, and the app collects no data at all.