High-fidelity prototyping is a tool for testing a product or service by observing how user interact with it. It should simulate the final product or service. The more accurate is the prototype the more accurate are the test results. The aim is to verify if the product or service designed satisfy the need of the user that came out from previous research. The test are usually run in usability labs (usability testing). Testing the product or service in the real context of use will bring to better results.