Can't help but feel like the product's domain (dayonepp.com) is practically typosquatting/deliberately confusing with dayoneapp.com, that of the incredibly (almost overnight) iOS diary product, Day One.

Couldn't help but bring myself to check registration dates (this was a year and a half later after Day One gained huge numbers of customers).

Quite probably accidental, but what a way it would be to gain custom... :|