You can reset your account, but this means wiping all your past progress, and then having you go through the onboarding process again and re-creating your account.
If that works for you, the first step is to delete your account from within the Settings screen of the Mend app. Just look for the "Delete Account" link at the bottom of the screen. If you don't see it, please check to make sure you've updated to the latest version of Mend in the App Store.
If you'd like to keep your account history, we recommend creating a new Mend account with a different email address.