here is an amazing piano app that is totally different with other piano apps

here you can see the video that show you playing with this app:
https://www.youtube.com/watch?v=8g4GNoNRh2c&feature=youtu.be

you can find even free piano apps at the appstore . but its completely different
see the video above then you will find it

in this app you have a piano with 2 octaves and you can choose accords that they will be played in Arpej or Jazz style during your play

this way you can select the accord and the piano will play arpej and you play your own music and the sound will be amazing

try it it worth