Stress Calculator UI

Continuing my daily Ui change, and for day 3, the challenge was to create "a calculator" and since the rules were open, I decided to create a stress calculator since thats something I deal with.

The goal with this concept would be to measure heart rate & blood pressure through the thumbprint reader to give an estimate on your current level of stress. the color on the time changes based on your level of stress.

What do you think? Are there any restrictions or additional data needed to give an accurate result? I'm not in the medical field so I made some assumptions lol.