This is free right now and seriously rocks! This app fits right into the “what apps are great for music performances with my students?” question.
Here is part of the App Store description – “Seline is a great live performance and improvisation music instrument that will keep you playing for hours, even if you haven’t touched any synth before. The sound is altered on the fly with a dozen of subtle AI algorhythms that add unbelievable expression, character and life to your music. Drones (chorded synth pads) are generated on-the-fly based on the complex analysis of your melody line and provide an excellent background layer for your melody.”
No brainer – go get it! Now! Seriously!