Proto.io

Proto.io was launched in 2011 by the company Labs Division. It was created to address the need for a tool that allowed designers and developers to build interactive, high-fidelity prototypes of mobile and web applications without requiring coding skills. The platform aimed to streamline the design process, enabling rapid prototyping and easier user testing.

Proto.io's strengths include its user-friendly interface, robust prototyping features, and the ability to create interactive simulations without coding. Weaknesses may involve a learning curve for new users and the potential cost for premium features. Competitors include tools like InVision, Axure RP, Sketch, and Adobe XD.

A Proto.io expert must have strong skills in user interface (UI) design, interaction design, and prototyping. Proficiency in creating interactive elements and animations within the platform is essential. They should also be adept at using Proto.io's features for building high-fidelity prototypes and have a good understanding of user experience (UX) principles to simulate realistic app interactions effectively.