What's the difference between the Free plan and the Starter plan?

Our Free plan offers users 1 prototype to test drive with unlimited screens and collaborators, for an unlimited period of time. Once the prototype is completed, you can delete it and create a new one in its place. 

When you upgrade to our paid Starter plan, you get 3 prototypes with unlimited screens and collaborators. Once a prototype is completed, you can delete it and create a new one in its place.