Free Trial Period for Paid Apps

Has UNA considered offering a free trial period on the paid apps so that customers can see how they function and if the app meets their needs?  I don't want to spend a $100 on  an app that doesn't function like  I need it to function.  Having a free  trial period to allow us to test ride  an  app and could produce more  sales and more reviews on apps too.  I can't even make a decision based on  the reviews because there are NONE.

My  Living Branch