What it costsfree
KitGrade is free to use. There is no account, no trial and no paid tier, nothing on this site is behind a payment, and no part of it asks for a card.
What that buys
Every score, every component of every score, the evidence each component was awarded on, the page that evidence was read from, the install transcript where a kit was run here, and the whole method. The read API carries the same figures, and the terms say you are welcome to build on it.
Why it is free
A directory that charges the reader has one customer and a directory that charges the vendor has another. This one charges neither, which is the only arrangement in which the ordering can be the arithmetic and nothing else.