Cymascope Foundation Ltd publish an iPad-first app, currently version 2.1.0 and updated on 8 July, that turns live or played audio into animated patterns it calls CymaGlyphs. It takes microphone input, has a playable keyboard, identifies notes in real time, records sequences, and mirrors to a screen for group demonstrations. The download is large at 1.4 GB, the age rating is 4+, and the developer states no data is collected. At the time of checking it had a single rating.
One feature deserves a flag: the app lets you compare visualisations at 432 Hz and 440 Hz. The visual difference is simply what you would expect from two different frequencies. The wider claim that 432 Hz tuning is more natural, healing or mathematically special has no support in acoustics or physiology, and the app also ships sound-therapy articles. Useful as a demo screen; not evidence of anything.
Price on the UK store is £12.99.