The KE is Klipper based. As for the app, I'm not interested in it as I didn't see any benefit of using it over Pronterface. I am looking to upgrade to the KE or perhaps this new one depending on the specs. But then the author makes mistakes like referring to the Bowden tube on a direct-drive unit I'll wait to get clarification.
While it is currently locked down while it is getting rolled out and tested by the bleeding edge consumer, it will eventually be unlocked.
Addendum: One concern that I have is the nozzels and whether or not it will be a costly propriety ones as some other manufacturers have done.
Okay, two things. This new one doesn't refer to being Klipper based but I can't imagine that Creality would go backwards in development.]
The price is $599 with options for a camera and lidar.