You're being obtuse.
The taboo around certain words in certain contexts is a consensus that serves a purpose. You can use them and receive certain extra attention, but also lose other people to distraction.
Like others, I have no problem with using this myself, but wouldn't pass it on to a general audience. If I were to do so, I would signal that I am careless and casual with the use of the word 'fuck', when it is too important of a word to devalue so.
If the creator's goal is to limit adoption to a certain audience, the use of 'fuck' is a good idea. If they want wider adoption, it isn't. Both are valid choices.
Sure, and in this case, good riddance to them. Anyone who avoids sharing this app because of the word fuck has zero sense of humor and isn't the target audience. Anyone who critiques it for the word fuck, isn't the fucking target audience. There is nothing wrong with the word fuck in non fucking formal circumstances, even to a general audience. There are times not to use the word fuck; this isn't fucking one of them.
:)