How to remove your Simplenote account
Be logged in, use the removal link which will take you to the Settings page. Halfway you’ll see the removal option. Everything will be removed.
Direct removal link: https://simple-note.appspot.com/settings
Helpful Trick: Removing online data
Publicly visible text/images often aren’t properly removed even when you succeed in removing an account. Try editing or removing them manually before removing the account itself. If you’re unsure what happens to your tracks: this can be found mostly in the Terms of Service/Privacy Policy; otherwise you can always contact Simplenote and ask personally. By the way, removal requests don’t necessarily mean your data will actually be removed (e.g. due to legal obligations).
Helpful Trick: Remove third-party logins
If you signed up for Simplenote using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Simplenote. Click here to find out how.