Yes, it is mentioned.
On a "About" page somewhere at the back. But it can still be that he asked Helge and that they agreed on this. I don't know.
But to be honest, I find it a bit hard to imagine. The whole thing is practically useless: as you can see from the screen capture pictures, you can read maybe twenty words on a page. As if a book has been printed on a tape measure. I cannot imagine anyone who would actually read it like that.
And about the word list: it is English-Quenya only, not the other way around. Besides, the search indexing is useless.
If you type in the letter "A" - you only see <A> on the screen.
If you type in the letter "B" - you get the entry for "ABANDON".
If you type in the letter "C" - you get the entry for "ABUNDANCE".
If you type in the letter "D" - you get the entry for "ABANDON" again.
If you type in the word "MAN" you get the entry for "*AMANIAN"
It's even worse than I thought ...
Mr. Lassiquendi is not only no good at Quenya, but he's also a lame programmer. Sigh.
Final conclusion: "ElvenSpeak" for the iPhone is a completely useless piece of software.
The developer seems to have tossed a few resources that he'd found on the internet into one package. It does not give the impression of having been designed to be used: reading a long document like Helge Fauskanger's Quenya course on a display which is barely an inch wide is not something that anyone who wants to learn Quenya is likely to do.
The included English - Quenya word list is rendered effectively useless because it cannot be searched in any useful way. There is no wildcard search; the display cannot be scrolled; the entries are cut off after a certain length; and well, it just does not work.
The only positive thing that I can say about it, is that it is free (if it hadn't been, he would probably have gotten into trouble - there is also music by Howard Shore in the app, and that is NOT credited).
Overall score from the Dutch jury: zero