Smart Git Integration for Jira provides a free evaluation period of 30 days after the installation, allowing you to see and use the application before you buy. All trials are fully functional; what you use during your trial is what you'll get when you buy.
Data Center apps must be purchased at the same user tier as the parent Data Center license. The app will only function if its license matches or exceeds the tier of the parent product – even if only some of your licensed users need to use the app. Learn more here.