πRing is the world's first cuffless blood pressure monitoring smart ring. Equipped with high‑precision PPG, ECG, temperature sensors, and an accelerometer, it enables tracking of blood pressure, ECG, heart rate, SpO₂, HRV, sleep staging, and physical activity in an unobtrusive ring form factor. Integrated with Dr. PAI—the world's first personalized AI doctor for hypertension management trained on 100 thousands pieces of one-minute segments each enclosed ECG, simultaneously highly sampled multi-wavelength PPGs. It delivers a closed‑loop service from intelligent symptom inquiry and real‑time monitoring to precise assessment and personalized intervention. Built on 23 years of original research and aligned with IEEE 1708, the international standard for wearable cuffless BP devices, πRing is currently under NMPA and FDA regulatory review. It addresses the needs of hypertensive patients, cardiovascular high‑risk individuals, elderly care recipients, and chronic disease management populations, offering medical‑grade data continuity for proactive health management.