Principle – Dedicated concept design tool

built for the biggest imaginations
There are a lot of things you might want to design: a short animation, a slick interaction, or an extensive multiple-screen app. No matter what you’re doing, you can do it with principle.

Animation
The principle’s timeline makes it quick work to illustrate the perfect bounce, ease, and pop.

Interaction
Want to design a totally new interaction? The principle gives you the freedom to experiment without limiting you to pre-defined transitions.

Multiple Screens
It’s a breeze to design the flow of a multi-screen app, and when you’re done, you’ll have a bird’s-eye view of all your screens.

Totally New, Yet Immediately Familiar
With artboards, magic animations, and a timeline, using Principle will give you déjà vu.

Touch Your Designs
Principle Mirror lets you interact with your design instantly on your device or view designs that others have sent you.

Lights, camera, interactions.
Showing your designs has never been simpler with the record feature. Export a video or an animated gif that can be shared on Dribbble, Twitter, and wherever else you’d like!

built for OS X
Principle is powered by Core Animation, the hardware-accelerated animation engine that iOS and OS X are built on. It also includes the Mac features you love: full-screen mode, a Retina interface, and auto-saving, so you’ll feel right at home.

Design for Any Size
Choose a device preset or enter a custom artboard size. Whether it’s web, desktop, mobile, or watch, you’re set!