Principle icon

Principle

Principle is an open-source visual tool for building interactive UIs. It allows designers and developers to design, prototype, animate and develop user interfaces without writing code. Principle focuses on animations and interactions.

What is Principle?

Principle is an open-source visual tool for building interactive user interfaces. It allows designers and developers to design, prototype, animate and develop UIs without writing any code.

Some key features of Principle:

  • Easy to use drag and drop interface to add and animate layers
  • Supports gestures like tap, drag, pinch, etc. to trigger interactions
  • Has a timeline view to visualize transitions and micro-interactions
  • Allows exporting production ready code components for iOS, macOS and Android
  • Focuses specifically on animations and interactions, unlike other broader prototyping tools
  • Integrates with Sketch and Figma to convert designs into interactive prototypes
  • Complements code-based tools for developers to bridge design mockups with actual apps

With its simplicity and focus on micro-interactions, Principle can help teams prototype and build highly interactive user interfaces faster. The exporter makes it easy to take those prototypes into production apps.

The Best Principle Alternatives

Top Apps like Principle

Figma

Figma is a cloud-based interface design and prototyping tool that is primarily used for user interface and user experience design. It allows designers to create wireframes, prototypes, diagrams, and production-ready assets for websites, mobile apps, and other digital products. Key FeaturesVector graphics editor for creating designs, icons, illustrationsRapid prototyping tools...

Framer

Framer is a pioneering prototyping and design tool used by UI/UX designers and developers to create highly interactive prototypes and animations. It provides a robust and versatile workflow that combines visual design with the power and flexibility of code.Some key features and benefits of Framer include:Intuitive visual...

InVision

InVision is a web-based prototyping and collaboration platform used by designers and developers to create interactive prototypes and collaborate on designs. It allows you to rapidly create prototypes of apps and websites without any coding, connecting screens together with hotspots to simulate the user experience.Key features of InVision include...

Origami Studio

Origami Studio is a free, open-source interactive design and animation tool created by Facebook. It allows designers and developers to design animated and interactive prototypes without needing to write any code.Some key features of Origami Studio include:An intuitive drag-and-drop interface for building interactive prototypes and animationsA physics engine...

WireframeSketcher

WireframeSketcher is a user-friendly wireframing and UI prototyping application. It enables designers and developers to quickly create wireframes, mockups, and prototypes to visualize and plan websites and web/mobile applications.Key features include:Intuitive drag-and-drop interface to easily add and arrange UI elements like text, images, shapes, icons etc.Extensive...

Interplay

Interplay is a versatile video editing application designed for novice and intermediate users. It comes packed with an intuitive drag-and-drop interface that allows easy video editing without extensive technical knowledge.Some of the key features of Interplay include:Importing and exporting all common video formatsMultitrack timeline for splicing together clipsHundreds...

HotGloo

HotGloo is an easy-to-use interface prototyping tool used to create interactive clickable prototypes and wireframes for web and mobile applications. It allows designers and developers to quickly mockup application user interfaces without coding.With HotGloo's drag-and-drop editor, you can choose from a wide variety of pre-built UI components like buttons...

Flinto

Flinto is a prototyping and mockup tool used to create interactive prototypes and mockups for mobile, web, and desktop applications. It provides a simple drag-and-drop interface to quickly add elements like text, images, buttons, form fields and more to artboards and link between artboards to create a clickable prototype.Some...

MockFlow

MockFlow is an online wireframing and prototyping tool used by designers and developers to plan and design user interfaces for websites, mobile apps, and other software products. Some key features of MockFlow include:Intuitive drag-and-drop interface for easily creating wireframes and prototypesLarge library of UI elements, templates, and icons to...

Mokup

Mokup is a user-friendly web-based wireframing and prototyping tool used by web designers, product managers and developers to create wireframes, mockups and prototypes for web and mobile applications. It provides an intuitive drag-and-drop interface to quickly sketch layouts and allows you to test responsive designs across various device sizes.Key...

Pixate

Pixate is a leading prototyping and design platform used to create interactive prototypes and high-fidelity mockups for mobile applications. It provides designers and developers with a robust set of tools to add gestures, transitions, animations and interactions to their designs in order to emulate real app behavior and flows.Key...

Mockup.io

Mockup.io is a feature-rich wireframing and mockup tool designed to help teams quickly create wireframes, prototypes and mockups for web and mobile applications. With an easy-to-use drag-and-drop interface and hundreds of built-in UI elements and templates, Mockup.io makes it simple for anyone to bring their app or website...

Threed.io

Threed.io is a powerful yet easy-to-use browser-based 3D modeling and design application. With Threed.io, users can create complex 3D models and assemblies right in their web browser, without needing to download or install any software.Some key features of Threed.io include:Intuitive drag-and-drop interface for constructing 3D...

Haiku Animator

Haiku Animator is a beginner-friendly 2D animation software for Windows, Mac, and Linux. Developed by Haiku Tech, it focuses on being an accessible and easy-to-use tool for creating basic 2D animation projects.Some key features of Haiku Animator include:Intuitive timeline interface for keyframing animationsOnion skinning to preview previous and...

Montage Prototyping

Montage is a user-friendly prototyping application that enables designers and developers to rapidly create interactive prototypes and wireframes for websites, mobile apps, and other software products. Its key features include:Intuitive drag-and-drop interface to assemble designs, add interactions, and link screens without needing to write any codeLarge library of preset...

UI Bakery

UI Bakery is a web-based user interface design and prototyping tool used for creating, collaborating, and sharing user interface designs and prototypes. It enables designers and developers to quickly mockup web and mobile application user interfaces without coding.Some key features include:Drag and drop editor with an extensive component...

Adobe Comp CC

Adobe After Effects CC is a digital visual effects, motion graphics, and compositing application developed by Adobe Systems and used in the post-production process of film making, video games and television production. Among other things, After Effects can be used for keying, tracking, compositing and animation. It also functions as...

Pixso

Pixso is a user-friendly photo editing application for Windows and Mac. It provides a wide range of features for editing, organizing and sharing photos.Some key features of Pixso include:Intuitive interface with support for drag and drop interactionsBasic editing tools - crop, rotate, resize, exposure, color adjustments, etc.Hundreds...

Moqhub

Moqhub is an open-source mock API platform that makes it easy for developers to create, share, and collaborate on mock APIs for faster development. It allows you to quickly mock out REST APIs and GraphQL schemas without needing to code and host a real backend.Some key features of Moqhub...

Shotbrander

Shotbrander is a user-friendly yet powerful graphics and video creation platform designed to help businesses, influencers, content creators, and entrepreneurs effortlessly produce professional-looking visual content for social media and online use.With an extensive template library spanning social media posts, Instagram stories, Facebook/YouTube covers and thumbnails, infographics, and more...

ProtoPie

ProtoPie is a leading prototyping tool used by designers and developers to create highly interactive prototypes for mobile, web, electronics, and IoT applications. With ProtoPie, you can:Quickly build realistic hi-fi app and website prototypes with complex transitions, animations, gestures, and micro-interactions.Simulate the exact look and feel of your...

Prott

Prott is a leading web and mobile app prototyping tool used by designers and developers to create interactive prototypes and simulations of application behavior quickly. It allows building responsive designs with a simple drag-and-drop interface to add elements like images, icons, text blocks and navigation buttons to screens.Some key...

PandaSuite

PandaSuite is an integrated software suite that includes applications for common productivity tasks like word processing, spreadsheets, presentations, and more. It is positioned as an affordable alternative to expensive suites like Microsoft Office or subscription services like Google Workspace.The core apps in PandaSuite include:Panda Docs - word processor...

Fluid UI

Fluid UI is a user interface design and prototyping platform used by designers and developers to design, test and iterate user interfaces for web and mobile applications. Its drag-and-drop editor makes it easy to quickly create interactive prototypes that look and work like the finished product.Key features of Fluid...

Concept.ly

Concept.ly is an online collaborative whiteboard and mind mapping tool used for brainstorming sessions, organizing ideas visually, and bringing creative concepts to life. It provides a flexible virtual space for teams to diagram thoughts and build out plans together in real-time.Key features include:Virtual sticky notes of different...

ReacType

ReacType is a software application designed specifically for visualizing, drawing, and analyzing organic chemical reactions. It features an intuitive user interface that allows chemists to quickly sketch out molecules, reaction mechanisms, and synthetic pathways.Some key features of ReacType include:Reaction drawing palettes with ready-made templates for common reaction types...

PreVue

PreVue is a leading web and prototyping platform used by UX designers, developers, product managers, and others to create interactive prototypes for websites, mobile apps, and other digital products. With PreVue's drag-and-drop editor, users can quickly design prototypes that look and work like the real thing, with customizable templates, dynamic...

App Sketcher

App Sketcher is a user-friendly web application for rapidly prototyping and mocking up mobile app designs. With an intuitive drag-and-drop interface, non-developers can easily create realistic representations of their app concepts without coding.Some key capabilities and benefits of App Sketcher include:Drag-and-drop placement of common mobile UI elements like...