The #1 App for Managing Your Child's Health
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Easily keep all your child's health information in one app. Track temperatures, symptoms, and medications with just a few taps. Take photos of your child's symptoms and receive feedback from our medical experts.


Parents' App of Choice

Welcome to FeverCoach


At FeverCoach, we know how much anxiety you feel as a parent when your child has a fever. As parents ourselves, our mission is to provide all parents worldwide with the guidance, support, and reassurance you need during these difficult times.
Launching in the United States, FeverCoach brings to North America the esteemed legacy of "Yeolnayo," the #1 pediatric app in South Korea. Our U.S. version is entirely redesigned to meet North American families' needs.
Ask your fever-related, child-specific questions to AI Coach. AI Coach is our AI model specifically tailored by parenting experts and domain professionals created to provide parents with immediate, precise, high-quality answers—answers that you won't receive from any other AI model or LLM.
Additionally, you can also request a human professional to double check and validate the answer you receive from AI Coach as part of our premium service (subscription to FeverCoach+ required).
On top of this, we also offer free tools that you can use to track your child's fever temperature and medication. Our free tools will inform you when your child's fever temperature input is dangerously high or when your child's medication dosage is above the recommended dose.

Discover Our App Features

AI Coach
Ask your fever-related questions to our AI

Medicine Calculator
Never give the wrong dose of medicine ever again

Human Expert Validation
AI-generated answer double-checked by a human
(Included with FeverCoach+)

Alerts & Reminders
Receive alerts to remind you to check temperature

Temperature Tracker
Track and log your child's fever temperature

Symptom Notepad
Save your kid's symptoms for accurate history

Introducing our Medical Experts
Trusted pediatricians and healthcare specialists dedicated to your child's wellbeing.
Our team brings decades of clinical experience to verify every piece of information in our app.

Dr. Myeongchan Kim | MD
Hello! I'm Dr. Myeongchan Kim, but you can call me MC. I graduated from Hanyang University Medical School and completed my research fellowship at Harvard Medical School and Massachusetts General Hospital. My passion for combining healthcare with technology led me to develop FeverCoach, which achieved over 2 million downloads in South Korea. An interesting fact about me: I was also part of the 'Freewill' volunteer group during medical school and continued medical service volunteering for around 10 years, including volunteering in Laos.
- Research Fellow at Harvard Medical School and Massachusetts General Hospital (2017-2019)
- Doctor of Medicine (MD) from Hanyang University (2004-2011)
Dr. Sam Ahn | MD, Family Medicine Specialist
Hi there! I'm Dr. Sam Ahn, a family medicine specialist with a medical degree from Gachon University and completed coursework in Medical Education at Yonsei University. As Medical Algorithm Director, I specialize in developing medical algorithms and creating medical content. An interesting fact about me: I'm passionate about making medical information and education more accessible, which is why I've dedicated my career to transforming complex medical knowledge into clear, actionable advice that everyone can understand.
- Completed coursework in Master of Education in Medicine at Yonsei University (2013-2015)
- Doctor of Medicine (MD) from Gachon University (2001-2007)


Dr. Yoon Choi | MD, Internal Medicine Physician
Hi! I’m Dr. Yoon Choi. After earning my MD at the University of Washington and completing an Internal Medicine residency at St. Elizabeth’s Medical Center, I’ve spent 20+ years caring for patients across New England. At Massachusetts General Hospital’s Laboratory of Medical Imaging & Computation, I applied deep-learning to sharpen diagnostic accuracy. Fun fact: I’ve delivered peer-education talks on the beta-blocker Nebivolol—proof I love turning complex science into practical advice.
- Medical Observer at Mass General Hospital - Laboratory of Medical Imaging and Computation (2017)
- Primary Care Physician & Board Member at Steward Medical Group (2011-2017)
- Doctor of Medicine (MD) from University of Washington School of Medicine (1998)
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