I remember this discussion coming up at least once before. AFAIR the argument was that many people had problems interpreting the test strips (not waiting long enough, mixing the results up). So they built a more foolproof way of reading the strips, which then tells you exactly what's up in simple words. Edit: Turns out there's a response in this thread that says the same and in better words. [1] Man I hate twitter UI. [1]: twitter.com/RealSexyCyborg/status/13017…...

"Pregnancy tests are 99% accurate in the lab, 75% accurate in the wild due to misreads- mistakes which are highly dependent on education and socioeconomic status. No, it is not stupid or wasteful to use a hardware interface to help women with this." twitter.com/RealSexyCyborg/status/13017…...