Animate your ideas, design better apps

Principle is the simplest way to animate your app prototypes. Whether you're designing the flow of a multi-screen app, or new interactions and animations, Principle lets build designs for every platform and immediately demo them for your team.

Would you recommend this product?
4 Reviews5.0/5
Thanks for the kind words everyone, can't wait to see what you make with it!
@danielchooper I like what people do using Principle, but since you're selling it for $129, how one can share it's prototypes clients using Android device or web browser like Marvel or Invision? Why are you so iOS centric?
I'll definitely be trying this out for an upcoming project. If it could export ObjC or Swift it could replace my other mainstay animation tool, Core Animator.

I use Principle mostly for quick demos when I try to communicate interaction ideas with my teammates. Principle is very good for this if you're not trying to create something too fancy but really want to share your ideas. Word to the makers: Keep the good work!


Really simple to use. No need for a tutorial to start :)


The preview window is often over the main window, not easy when you're working on a laptop.

Oh wow! This looks really amazing! Rad work Daniel!
Whipped through a couple tutorials - this thing is going to be great. And fast.