What Ziplet offers that is somewhat unique is the option to respond directly to individual students even when they are responding to a group survey. The purpose of that feature is to make it easy to ask follow-up questions or to give encouragement to students based on their responses to a question posed to the whole group.
Applications for Education
Ziplet fits in a gap between tools like Kahoot and Google Classroom. For that reason it could be a good tool for engaging students in discussions about assignments, course topics, or the general feeling of the class. Ziplet does offer a Google Classroom integration as well as an Office 365 integration.