Ripplemaker brings modular synths to all skill levels with an iOS app
 

There are plenty of apps that can turn your phone or tablet into a synthesizer, but they tend to fall into two camps: they're either affordable and simple or pricey and robust. While that's sometimes due to the nature of the instruments they're repl...

https://www.engadget.com/2017/06/19/...lar-synth-app/