

Proto.io is a versatile prototyping tool that allows you to design interactive prototypes for web and mobile applications. It supports both low and high-fidelity designs with a user-friendly drag-and-drop interface.
Key features
- Drag-and-drop interface for easy design.
- Supports web, iOS, and Android prototypes.
- Real-time collaboration with team members.
- Built-in user testing features.
- Customizable templates and UI components.
Pros
- Intuitive interface for quick prototyping.
- Freemium pricing model for diverse needs.
- Responsive designs across devices.
- Strong community and support resources.
Cons
- Limited features in the free version.
- Export options can be restrictive.
- Some performance issues with complex prototypes.