Three sections
Lower section 下停
Where it is
From below the nose to the point of the chin. The band that holds the mouth and the jaw.
What the books said
삼재는 이마·코·턱을 천(天)·지(地)·인(人)으로 구분하고, 삼정은 삼재와 같은 부위를 상·중·하정으로 나눈다.Our rendering: The three sections name the three bands of the face that hold the forehead, the nose and the chin.
面之三停者，自發際下至眉間為上停，自眉間下至鼻為中停，自准下人中至頦為下停。Our rendering: In our rendering: from the hairline down to between the brows is the upper section, from between the brows down to the nose is the middle section, and from below the nose to the chin is the lower section. These are the boundaries this app measures.
What this app does not do
It gives no score, sets no grade, builds no ranking, and never compares you with another person, a celebrity or an animal. It does not settle anything about your fortune, your work, your money, your health or your lifespan. It quotes what the books said, and it does not apply those words to you.