Body Composition
Track visceral and midsection fat over time.
The Health Metrics Women Never Hear About
Get Petal
$199. One size, 12 months of Petal Wellness included.
Available on iOS today; Android coming Fall 2026.
Metrics that Matter
Discover new ways to understand your health.
Mobility & Balance
Understand subtle changes in how you move.
Activity
See your movement patterns throughout the day.
Heart Rate
See how your cardiovascular signals change over time.
meet our clinical team
Developed alongside doctors in women's health, breast health and cardiology
Dr. Zara Butte, MD
Head of Clinical Product
Board-Certified Internal Medicine
Board-Certified Internal Medicine
Dr. Tamara Rajaram, MD, MBA
Clinical Advisor
Dr. Nicolas Prionas, MD, PhD
Chief Medical Officer
Radiation Oncology at UCSF
Radiation Oncology at UCSF
Dr. Vasant Salgaonkar, PhD
Head of Clinical Research and Development
Made To Wear Close To Your Body
Why Women Love Petal
“I forgot I was wearing it.”
—
Kelly
“It feels like a secret weapon for my health.”
—
Sarah
“I expected it to be bulky, but I barely felt it all day.”
—
Andrea
PETAL IN THE PRESS
"I tried it on and found it extremely comfortable , even more so than a smartwatch or smart ring."
Why Petal exists
Women's bodies have always held a deeper story. We built Petal to listen.
From the first prototype, Petal was designed around a woman’s chest, cycle, and physiology—so the data reflects her body and her baseline, not someone else’s average.
And with her permission, every woman who wears Petal can help build a better understanding of women’s health.
Looking Ahead
Petal is built for what comes next.
Today, Petal tracks heart patterns, visceral fat, mobility, and activity.
The team is also researching future clinical applications, including changes in breast tissue over time.
Any diagnostic capability would require clinical validation and regulatory clearance.
Know Your Body Better
Build a personal baseline from your own body — and help improve what we know about women's health
Questions Worth Asking
Yes. Petal emits no ionizing radiation and has no Wi-Fi or cellular radios — it reads your body the way a Bluetooth earbud reads sound: low-power, short-range, external. It has been designed and reviewed alongside leading oncologist and cardiologists specifically for everyday, long-term wear.
No. Petal connects only over Bluetooth Low Energy to your phone. It has no Wi-Fi or cellular radio. And unlike streaming audio that keeps the radio active, Petal sleeps >99% of the time, gathering sensor data passively and waking up only for micro-second bursts to sync readings.
No — Petal is a wellness device intended for tracking and insight, not for diagnosis or treatment of any condition.
Yes. Petal is a thin, one-size insert worn between the breast and garment, with direct skin contact required to take a reading.
Every Petal ships with 12 months of Petal Wellness included