Principle review
Advanced animated prototyping with Figma and Sketch imports, but no collaboration or handoff.
Reviewed by iTechGuides Editors · Editorial team · Updated Nov 2026
Principle is a native macOS tool for designers building animated, interactive interface prototypes. Its artboards, transitions, events, and multi-screen flows suit solo designers and small teams that need to demonstrate how an interface behaves, especially Mac specialists working on advanced animated flows. Device presets and custom artboard sizes support mobile, web, and desktop designs, while an iOS companion app mirrors designs for review.
Animation is a central strength: the timeline offers easing and spring controls, and reusable components can contain their own interactions. Designers can import and re-import work from Figma and Sketch, then share interactive designs through the web or export them as HTML, video, or GIF. That makes Principle a focused prototyping companion for those ecosystems rather than a replacement for their design tools. Choose it when motion and interactive flows are the main deliverable; it is less suited to teams that need collaboration inside the prototyping workflow.
According to the vendor's pricing page, the Principle license is a one-time $129 charge per computer and includes new features released within one year of purchase. A one-time $99 per-computer renewal restores access to features released after that initial year. A 14-day trial is available. The tradeoff is clear: buyers pay per computer, and the product does not provide real-time collaboration or developer handoff. Principle fits individual Mac-focused designers prioritizing animated prototypes; teams that depend on shared editing or handoff should choose a tool with those capabilities.
Questions about Principle
Is there a free trial of Principle? Yes: a 14-day free trial.
What does Principle run on? macOS, iOS and Web. It runs as a desktop app and as a mobile app.
What does Principle integrate with? 2 integrations: Figma and Sketch.
Who is Principle built for? Solo users and small businesses (our editorial estimate).
Principle pros and cons
- Where it wins
- Timeline animation includes easing and spring controls.
- Build multi-screen flows with reusable components and embedded interactions.
- Import from Figma or Sketch; export as HTML, video, or GIF.
- Where it doesn't
- The license costs $129 per computer as a one-time charge.
- Real-time collaboration and developer handoff are not supported.
- The native app is for macOS; iOS is a companion for mirroring.
Principle fact sheet, pricing and score →
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