To delete your account, go to the "Settings" of the app (top-right corner of My Profile), then select "Account information".
Log in again using your password. Then, click on "Delete my account". This action cannot be undone.
All your personal information will be deleted (email, user information, profile picture, moovs and location data, preferences, ...).
Your contribution to this app (distance traveled per means of transportation, CO2 saved and points earned) will however be saved but the data will be anonymized, which means that it will be impossible to link you with that data.