Userinput.io is a platform that provides businesses and individuals with the opportunity to receive feedback on their websites, apps, prototypes, or ideas. By connecting users with a panel of real people, Userinput.io allows clients to gather unbiased opinions and insights, helping them to improve user experience and optimize their offerings. The website http://userinput.io serves as the primary interface for clients to submit their projects and for reviewers to deliver their feedback. The service is designed to be user-friendly and aims to quickly deliver constructive criticism to aid in better decision-making and product development.