Most sellers allow you to demo their templates before purchasing. This is a Templett feature that very popular among sellers and customers. This allows you to try out the Templett application as well as the seller's template to see if it's the right fit for you before purchasing.
How to demo a template
If the seller allows demos of their templates, you'll usually find a demo link in the product or listing description. Click or copy and paste that link in your browser and you'll be taken to the Templett design area where you can play around with the demo.
Th demo area is limited. You obviously won't be able to save a template. You'll need to purchase the template before gaining access to the full featured demo area where you can save your templates.