A brief play with Processing JS for iOS will tell you that it is very definitely a version 1.0. Having said that, I think it’s a good start and even though I’ve only messed around with it a little so far, but it is possible to get stuff up and running very fast.
This is processing JS and not processing. For me that meant that I’m not as familiar with this version as I am with the regular flavour of processing. Even so, I fiddled with the sample sketch and got it to do a few different things already.
I’m really hoping that this app gets some more functionality soon. Things like a way to export or email the code out would be handy, and a reference manual that’s on the device / app and isn’t just on the web. That would be good.