Anyway, one other thing that was pointed out in a reply: The test strips probably have to go through a length FDA certification process, so it probably made sense to build the device around a standard test strip, as it'd be prohibitively expensive to certify a separate device
Oh and one neat thing in the Naomi Wu thread that was interesting: How the indicator paper works, and why they can't just make it say "YES" when you pee on it:
The lines are actually antibodies attached to small gold particles. They fix to hormones in the piss, and are carried until an area where another line of antibody capture the hormones, and the gold-antibody conjugate.
One example of the latter is the disease chytridiomycosis, spread by the fungus Batrachochytrium dendrobatidis. It was only found in africa, and then spread to north america through the pregnancy test frogs. nature.com/news/pregnancy-te…
Pregnancy test helped to bring frog-killing...
Nature - Imported African animals released into the wild spread chytridiomycosis.nature.com
So it's something to keep in mind for the future, when I'm talking about things like this which stray outside of my usual "some weird/old computer thing" teardowns. This one definitely has wider social implications I should have thought more about before tweeting as usual.