Yes. You can delete both a THYIM PIN account and a THYIM Helper account.
The easiest way to do this, is to go to either App, go to the menu, and at the bottom of the menu - in red text- simply click on the Delete Account section and follow the steps.
Alternatively you can request to delete your account by contacting THYIM Customer Service at:
1-833-THYIM15 or 1-833-849-4615