I read through the website, and it feels... odd.

Is this font's only purpose to be variable-width tunable?

The website has this interesting showcase:

"[Student fluency] is measured in Words Correct Per Minute... Each student read out loud a passage set in a control of Times New Roman, then four of the Lexend Series — Deca, Exa, Giga, and Mega."

They even give example text for the viewer in both fonts. Of course, Times New Roman was blown out of the water, and the viewer can feel it.

But... this is apples to oranges. Of course the viewer can feel it, Times New Roman is a freakin' serif, and there are a quinquagintillion sans serifs for small digital text, for good reason! Then what does this font have over other sans fonts? I couldn't find the "Stanford study" or any other comparisons, but if I were to surmise a guess:

"Variable font technology allows for continuous selection of the Lexend Series to find the specific setting for an individual student."

It's to be able to adapt for a student reader's preferences.

I dunno, the site's framing of "changing the way the world reads" feels disingenuous -- it's a nice sans tho.