Why it was made

You had 365 days and used none of them

Gmail can schedule an email once; it cannot remember a birthday every year. Dont Remember stores the date and the few facts you give about a person, drafts a fresh note in your chosen tone the night before, and sends it from your own Gmail at 8 AM in their timezone. Anniversary emails update the number of years on their own.

It is not a greeting card service or a social network, and it does not send on your behalf from a branded address. There are no 'via robot' footers, the page says the facts you supply are used only to write to those people, and you can always edit, regenerate or delete a draft before it goes.