What can we or what should we do?

What can we or what should we do to get more responses for our survey? We currently just shared our survey with our class and barely half our class did it. So we thought before we even go to other classes what is a way we can make more people take our survey. Do we need to show more or less of the app to them? Do we need to show the website more or less? Do we need to offer a prize so that people will take the survey? We just thought we might have been to pushy and we didn’t know it. For example, When you try to buy something from anywhere usually the person selling the product tends to be pushy. So instead of what we were traditionally doing we just let the person observe our product by themselves and if they have questions ask.