You have the ability to change between all four of the Stock Rover plans during your Premium trial. In that way you can experience what each plan offers. By default you start with the Premium Plus plan, which is the most capable of the four plans. However if you want to trial either the Premium plan, the Essentials plan or the Free plan, you can do so. You can switch between the various plans as many times as you like during the Premium trial period.
To change your trial plan, go to the dropdown menu with your account name found in the top right hand corner of the Stock Rover screen and select Change Trial then choose the plan you want to trial. Note this option is only available when you are running the Premium trial.