Design and prototyping tool for web and mobile apps

All-in-one UI and UX design platform to create UI assets, prototypes and simulations

Preferred by today’s top companies

From clickable prototypes to functional simulations

Create from clickable prototypes to fully-functional simulations, without typing a single line of code
We provide a full range of tools, so that you can focus on creating delightful user experiences
Testing through simulations will reduce rework and boost user adoption

Free UI Design with no limits

Design your UI assets for free, without any restrictions on number of projects
Enjoy all UI design features, from the vector design tool, the pen tool, to pathfinders and more

Bring your interaction design to a superior level

Design full interactions of your web and mobile products, from the navigation to the last details of the user experience: advanced interactions, animations, transitions, interactive UI elements
Launch easy to use products and boost user adoption

Design web experiences with a full range of interactions, animations and transitions
Create anything from simple links to advanced interactions

Choose from a ton of gestures that allow you to rotate, tap, swipe, scroll and pinch your way through your mobile app prototype

Add sequences of actions and conditions in your interactions
Design and test the real experience

Create prototypes for websites and web apps that adapt to multiple screen resolutions for desktop and mobile
The UI elements in your screens will also adapt automatically
One free prototyping tool to rule all devices!

Forms and data in motion

Design, prototype and simulate fully-functional forms and data grids-lists, and test them instantly without writing a single line of code

Bring your prototypes to life in a click

Visualize your web and mobile prototypes, while you design them
Simulate prototype behavior while you design
Use our Emulator and Viewer App to test your prototype live on any iPhone, iPad or Android device

A free prototyping tool to rule all screens

It's easy to get started and it's Free!

Design better experiences together

Validate early and often
Allow all your stakeholders to test and review your prototype, leaving no room for misunderstandings
Improve communication between teams, putting them all on the same page

A single click lets you publish your prototypes and invite all project stakeholders to give feedback early on

Multiple users can work on or edit the same prototype simultaneously
Our version control system tracks the changes

Developers can inspect prototypes and get UI assets
Keeping developers in the loop means your designs get built pixel perfect
Interactive prototypes help us learn quickly and iterate, so that we can create great products
Efficiently showing our requirements has led to highly functional, well-designed products that our clients love
With the ability to create prototypes across different screen sizes and devices, we are able to validate hypotheses prior to creative design and build
Keep consistency in your Style Guides, UI component libraries, interactions, templates and other deliverables
Share your assets with design teams, business analysts and developers

Easily refine and reuse the built-in libraries or create your own
Personalize them with your own style and interactions