https://phys.org/news/2017-08-handheld-spectral-smartphone-diagnostic-tool.html

I wish my doctor had this. I still have to wait 10 days or so for blood and urine results.

 

Why do not we make a diy one?
It will not have the same performances but it will have a purpose to learn.
Find out how it is done or how it looks inside and post it.

If the materials are inexpensive we try.

Let's use ESP8266 that costs only $ 4. It offer communication with the phone, the laptop and it also has an ARM processor at 80MHz.

If it turn out to work we can think about improving it.

For example, I do not like using blood.
http://www.gluco-wise.com/
For example, this glucose sensor does not need to sting you.
Is not that better?
https://en.wikipedia.org/wiki/Noninvasive_glucose_monitor
https://www.cnbc.com/2017/04/12/apple-working-on-glucose-sensors-diabetes-treatment.html