I want to test a specific app-how do I set it up during the free trial?

You can test a specific app during the free trial. If you mean Genymotion SaaS, start a trial request after validating your account, then choose Individual or Entreprise and submit the form. How do I get the free trial for Genymotion SaaS Cloud?

For Genymotion Desktop Pro, the trial is 30 days and you can install it after activating your account and downloading the trial version. The trial page says to follow the Desktop user guide to install and set it up. Is there a trial for Genymotion Desktop Pro edition?