Sentiment Ranking Rules (Current Version)

• Score range is 0-100. Higher means stronger sentiment quality and maintenance signals.
• Core composition: rating quality 50% + review scale 20% + low negative feedback 20% + issue response rate 10%.
• Rating quality uses Bayesian smoothing (C=40, m=4.1) to avoid tiny-sample score inflation.
• A review-confidence factor down-weights low-sample products; more reviews lead to more stable scores.
• 90-day update activity affects score: ≥6 updates = 1.00, ≥3 = 0.92, ≥1 = 0.82, 0 = 0.55.
• High-score compression: diminishing gains above 80 and 90 to prevent long-term score monopolies.
• Eligibility gate: at least 8 reviews and at least 1 update in the last 90 days, otherwise score is 0.
• Data source prefers App Store; if unavailable, internal ratings are used.