You can delete your account (and all data we have about you) by going to the right-hand tab and selecting "Other" at the bottom.
A quick heads-up: Since data privacy is important to us, this action will delete everything we have about you. That means all the answers you've provided about your friends will also be erased.
If you haven’t connected with friends yet and are still in the signup process, you can delete your account on the page where you send invitations by tapping the "..." in the top-right corner. :)