Account deletion is required to delete your data. Do this by going to "About Elm" page on the app (which you can reach it from top-right button at home and your page). There you will see account settings at the bottom. Then tap on "Delete account". Caution: If your email was verified, this action will permanently invalidate it, and you will not be able to use it to create a new account.
All data will then be moved to trash and retained for a legally required period before being permanently deleted. You can find the details of this process in our Privacy Policy. Note: Data in the trash cannot be recovered or queried.