Smile ScoreScore ranges and what they mean

Overview

Smile Score is Smile Tracker's core expression metric. It combines lip geometry, eye crinkle (Duchenne marker), timing, and symmetry into a single 0–100 rating. Most users score between 50–85 depending on photo quality and expression type.

80–100 (Excellent)

Excellent Smile Scores (80–100) indicate highly authentic, warm expressions with strong Duchenne markers — visible eye crinkle, elevated symmetric lip corners, and natural timing. These smiles read as genuinely happy in both human and AI evaluation.

60–79 (Good)

Good Smile Scores (60–79) represent pleasant, approachable expressions — often social smiles with moderate eye engagement. These read as friendly and photogenic even if Duchenne markers are partial.

40–59 (Average)

Average Smile Scores (40–59) often reflect muted expressions, asymmetry, or photos taken mid-expression. Low eye engagement and tight jaw muscles are common causes.

0–39 (Developing)

Developing Smile Scores (0–39) indicate minimal smile activation — neutral expressions, frowns, or photos with poor face detection. These scores suggest room to practice expression and improve photo setup.