I feel pretty confident in assuring you that FOCAL https://en.m.wikipedia.org/wiki/FOCAL_(programming_language), which first appeared 56 years ago is ever going to have to compete with this app in the language space. In fact as the link to the Wikipedia clairifies, there are other things named FOCAL other than the “Formulating On-line Calculations in Algebraic Language” programming language.
If this was another programming language and it didn’t explicitly callout its namesake I think I’d probably side with you here, but this isn’t a programming language and you implying that someone isn’t respecting the classics here is misguided at best. For example, If someone created an application called Java that helped you brew the perfect cup of coffee or maybe plan a trip to the island of Java, that certainly would not be something that is “not respecting the classics” and “overwriting computer history” for Java the programming language.
In general I agree we should strive to preserve history, especially in such a young field. However criticizing an application developer over their name choice where there is no actual conflict with the things that share its name is pedantry.
E.g., I didn't like seeing Simula reused (probably one of the most influential programming languages, since it introduced OO), or LiveScript (the original name of JavaScript that was a functional synonym for many years). And, regarding FOCAL, you've to start a quite specific search, already, for this showing up in Google top ranks, and this won't become any better, when there are other products by this name in the IT space. Especially, since there won't be much new pages on this and Google prefers newer entries.
(Regarding Java, you are probably aware of the concept of product domains in trademarks? Clearly, a computer programming language and a computer application are in the same domain.)
And I don't think there is any fault with expressing a perceived conflict early on, as compared to when it's already an established product and the conflict really plays out.