Is new dehydration scan app exact?

[123saz]

Hi. I downloaded this new app called Dehydration Test (android), which checks if you're dehydrated through a finger scan. I was wondering if someone knew how exact the test is

 

[B. Diddy]

Duplicate, see this other thread: http://forums.androidcentral.com/android-apps/593188-dehydration-test-app-exact.html. Thread closed to prevent parallel discussions.