Interaction & prototyping design tool for iOS apps

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This looks like everything I've ever wanted... Now to come up with a spare $150.
Hey, I'm a designer on Form. Happy to answer any questions you may have!
@heyadam Can you help me understand how you compare to Pixate? cc: @paulcolton
ahhh! why aren't there more PH commenters on this!? here's some great insight from the Origami Facebook Group: Aaron Abentheuer - "Form is super-amazing as far as I can tell from using it for just a few hours now. Well worth the 150 bucks. For everyone who's used QC and Origami before in a meaningful way will feel immediately at home with Form. All the patches are named and function very similarly, just with an even greater focus on IxD. It's like Apple rebuilt Quartz Composer with the sole focus of Prototyping. The greatest feature of course is the ability to "stream" your compositions to the device, which feels incredibly native without serious lags and incredibly solid for an app that launched a few hours ago. The updates are instantaneous. As I've moved forward with prototyping a lot of stuff with Swift to directly test on device this will come in handy for the main purpose I've used Quartz Composer ever since Swift was introduced: Rapid, quick'n'dirty prototypes of singular interactions/animations. But there are a few things missing in Form that I wish that were there and I am sure will be implemented in the future to complete the prototyping powerhouse. The most important among them for me at least is Networking in an easy way, which is really great in Quartz Composer for prototyping. There seems to be an API for expandability but I didn't take a closer look at this yet so we'll see if it's as capable as QC+Xcode/ObjC. But for now, I really have to say: Chapeau, Relative Wave. This is what I've been waiting for in a long time — a polished successor to Quartz Composer focused on rapid interface prototyping. I hope it catches on and this turns out to be the beginning of a story of huge success that everyone who's reading this should really be wanting to be a part of. This is huge."
This seems like an alternative to Origami/Quartz. I'd be curious to hear from anyone who's tried both and what the key differences are (the iOS viewer is most obvious one to me) and if they felt Form was easier to pick up.