FB’s Origami

I do. It’s great for hand-eye coordination. My favorites are the crane and the rose.

no, that’s the reason it’s free

I love it, it offers potential and flexibility that other prototyping tools can’t offer. I’ve met a lot of Google designers who prefer it too, the speed and native aspects are great. However it definitely has a high learning curve, you’re not coding but at the end of the day it’s closer to programming than the simple point and click Principal can do.

Personally, having to export layers from sketch to origami is the main dealbreaker. Unless if you are an organized person, origami is too time consuming.

I use it every day. Once you have mastered it you can build just about anything.