To delete your Hilo app account, go to "Profile" tab of your App and tap on the "Settings" button. Click on  "Delete account". 

Once your account is deleted, you will no longer have access to your data.

If you are sure that you want to delete your Hilo App account, you will be asked to enter the word “Confirm” and press the "Delete my account" button.

This action will delete your account, all your personal data, and recorded BP readings.
Please note that this action is not reversible.