When you sign up with a Business account, you can try the Optimum plan for free for 2-week. Personal and Academic accounts get 2-day and 5-day, respectively.
FITVAC™ Solution provides cloud-based services on the web. It is no need to install. You can use the program by logging in and clicking the "Launch program" button on the main page. Regarding the use of the program, please check the Quick start page.