Principle

Principle is a Mac-exclusive prototyping tool for UI/UX designers to turn static designs into interactive, animated prototypes. It integrates seamlessly with Sketch and Figma, letting you import assets and add gestures (taps, swipes), transitions, and custom animations in minutes. Real-time previews enable fast iteration, while you can share prototypes via links or export as videos/GIFs. Ideal for testing user flows or presenting ideas to stakeholders, it bridges the gap between design and interactive testing with an intuitive, code-free interface.