Your parents send a photo of a rash at 11pm and expect an answer. A clinic is closed, a phone line is busy, and a raw search query only scares them.
That gap — the small, persistent health worry with nowhere cheap to go — is exactly where China's largest AI-native health app now lives. Its name is AQ, and it just passed 150 million users.
From 100 million to 150 million in eight months
At the 2026 INCLUSION Conference on the Bund in Shanghai (10 September 2026), Ant Group said AQ had reached 150 million users and was handling roughly 20 million health inquiries per day.
That is a 50% jump in eight months. The app had crossed 100 million users during the 2026 Chinese New Year holiday (announced 23 February 2026), when Ant said AQ became the world's largest AI-native health application. AQ launched in June 2025.
The growth curve matters because it is rare for a vertical health app — not a general chatbot — to reach this scale. Most "AI doctor" products stall at the novelty stage. AQ did not.
What it actually does
AQ is built around everyday, pre-hospital health needs rather than diagnosis:
- Health Q&A, AI skin analysis ("拍皮肤"), and voice-call consultations — the features that drove the holiday surge.
- Hospital appointment booking and online consultations, closing the loop from "ask" to "see a doctor."
- Personalized health coaching across weight, exercise, nutrition, sleep, and mental wellbeing; it can connect a smartwatch or fitness band and track more than 10 health indicators.
- "AI doctor avatars": real physicians train their clinical experience into an AI clone for follow-up. Ant has said AQ links users to thousands of hospitals and hundreds of thousands of licensed doctors, with top-hospital specialists offering avatars.
The design philosophy is "answer, then act." You ask a symptom, get guidance, book the appointment, and later track the condition — all in one place. That closure is what separates it from a smarter search box.
Who is using it — and why
The Chinese New Year data tells the adoption story:
- Between 9 and 21 February 2026, 52% of AQ's new users came from tier-3 cities and below — younger users bringing the app home to their parents.
- Overseas usage by traveling users rose 106% versus the pre-holiday January period, as people leaned on AQ for climate- and diet-related discomfort abroad.
- Chinese state media reporting on Ant's disclosures notes roughly a third of AQ's users are middle-aged or elderly.
The pull is structural. In China, hospitals at tier-3 — the top of the pyramid — are about 9.5% of all hospitals but handle 58.4% of hospital visits. For a "knee hurts, is it serious?" question, the nearest tier-3 hospital is often far, crowded, and overkill. AQ fills the gap between doing nothing and a hospital trip.
The weight-management push
In June 2026, AQ launched a nationwide weight-management initiative encouraging users to collectively lose 100 million jin (≈ 50 million kg) through science-based, sustained control, supported by smart devices and behavioral incentives.
As of September 2026, Ant said 2.75 million people had joined and collectively lost more than 2.5 million kg. A month earlier, in July 2026, Ant took a stake of more than 28% in Boohee Health (薄荷健康), a weight-management company with nearly 20 years of operation, about 200 million registered users, and a food database of over 1.6 million entries. Boohee founder Ma Haihua remains the company's largest overall shareholder.
The logic is straightforward: AQ supplies the conversational front door; Boohee supplies the dietary knowledge and intervention engine behind it.
What readers can do now
- If you build health AI, copy AQ's "answer → act → track" loop rather than a smarter chatbot — closure, not cleverness, drives retention.
- If you watch Chinese AI, track tier-3 and elderly adoption; that is where the volume and the defensibility are.
- If you use such an app, treat its output as triage, not diagnosis. AQ itself routes hard cases to human doctors and hospitals.
Honest limitations
- The 150 million users and ~20 million daily inquiries (10 September 2026) and the 100 million users milestone (23 February 2026) are from Ant Group official press releases (antgroup.com).
- The 52% tier-3 new users and +106% overseas travel usage during the 2026 holiday come from Ant's February 2026 release.
- The weight-initiative figures (2.75 million participants, >2.5 million kg lost as of September 2026) and the >28% Boohee stake are from Ant's statements carried by TechNode and Ant's own materials.
- The "roughly one-third elderly users" and hospital/doctor linkage figures are from Chinese state-media reporting (Guangming Daily) on Ant's disclosures, not independently audited.
- AQ is a health-assistant app, not a licensed diagnostic device; we did not verify the clinical accuracy of its advice, and readers should not substitute it for professional care.