Yes, all our Zap Apps come with a 15-day trial. Please note that there is no functional difference between trial and licensed version.
All our apps are licensed by user-tier which is based on the total number of enabled CRM Users. To find the enabled CRM users, browse to Settings >> Security [...]
Zap Objects offers few apps as free for commercial use. In-order to get your free license, register the license profile online. (Refer licensing KB articles for more info)