Can’t delete
Nice idea but there’s no way to delete keys from the database. Or if there is, it’s not in the least intuitive.
Response from developer
Hi, you are able to delete records simply by tapping on the image and swiping to the left. You should then start to see a red DELETE indicator on the right side of the screen. Let me know if that doesn't work for you and I can show you a screenshot. Thanks for reporting this.