Mendix Studio Pro is a low-code IDE ( Integrated Development Environment) that can be used for development purposes of Mendix related projects.
Mendix Studio Pro only can be downloaded if you have signed up with Mendix or have an account with Mendix if you haven’t already got an account with Mendix you can here sign up for an account with Mendix.
From this MX Platform IDE link you can find out more about Mendix Studio Pro.
After the installation of Mendix Studio Pro go ahead try these two simple tasks to try Mendix Studio Pro.
Part 1: Build a Responsive Web App video
Part 2: Add a Native Mobile App video