In specific contract No 2 issued under the framework agreement OC/EFSA/AMU/2019/02, EFSA requested Open Analytics to implement a web application for collecting information on using Critical Appraisal Tools (CAT). The web application has three modules: one for managing purposes, one for viewing the data and one with the actual survey. Visibility of these modules is defined according the type of user that has logged into the web application. There are two user types: (1) AMU Level, able to add/edit records; (2) EFSA Level, able to view all records. The visualization module is accessible by all users with the same functionalities, while the manage and survey page are only visible to AMU users. Data are stored on a shared docker volume which allows all users to view the latest available data.