Never Have I Ever is a simple game which presents situations to you that you can say if you have done that or not.
As soon as you open the app a situation will be presented and you can swipe left and right to answer.
Later you can look at your previous responses and change them.
You can also view how many other people in the world has either done or not done that same situation.
Last, you can submit your own 'Never Have I Ever' and have the rest of the world be asked your situation.