Didn't care for the first one.
It sounds like early Casio KB.
I liked the second one better.
Doing it on a tablet might be more fun though.
I think the younger generation will have some fun with it, but they also get bored easily.
I have a guitar app on my phone.
It's a nice gimmick.
I play House of the Rising Sun or My Sweet Lord and my friends go: Oooohh Aaaahhh.
But still a gimmick.
I like playing my KB better
So much more creative.
But who knows where these apps will take us ...
Thanks for sharing
Eric