Overview Iron Supplements and Vitamin D has the following
Smartphone app for non-invasive detection of anemia using only patient-sourced photos
This appears to be the 3rd smartphone application to detect anemia
Did not notice if any of these are ready to be used by the general public
Doubt that this, and similar tests that eliminate use of doctors, has been accepted by the FDA
A smartphone app looking at nails could suggest a few other deficiencies and health problems