Petal has eight advanced, clinical-grade Bio-Impedance Analysis (BIA) sensors. This low-power technology safely measures your body's unique electrical resistance to gather data. These sensors are non-intrusive, produce no harmful radiation, and are completely safe. They use the same technology found in high-end smart scales.

Petal's sensors collect data at the source of origination for greater accuracy — right at the locations of heart, breast, and thorax.

Precision Heart Metrics:

• We measure ECG/EKG with accuracy verified against FDA-approved devices, providing highly reliable Heart Rate and HRV data to monitor your fitness level and overall health.  
• Additionally, Cardiovascular Disease is the leading cause of death for women in the US, yet symptoms often present differently in women than in men—particularly during perimenopause and menopause when hormonal changes can affect heart health. Petal provides women with the tailored insights needed to monitor their cardiovascular wellness through every stage of life.

Advanced Cycle Tracking:

• Unlike traditional wearables that rely on basal body temperature taken from peripheral locations like the finger or wrist, Petal uses breast tissue measurements as a more direct biological indicator.
• Your breast tissue and hydration levels undergo distinct, predictable changes throughout your cycle. Our sensors create a private, bias-free characterization of these fluctuations, allowing Petal to accurately track your cycle through your body’s unique tissue and ductal patterns.

Body Composition:

• Your breast tissue is made of adipose (fat) tissue, which Petal's sensors can measure to understand your midsection and visceral fat percentages. This allows you to mitigate metabolic health risks and inform sustainable, data-driven lifestyle changes, as well as support your fitness goals.
• Moreover, monitoring and reducing visceral fat (the fat surrounding your internal organs) can help with long-term wellness and disease prevention, especially post-menopause.

By combining this data with our proprietary AI based on real women's data, Petal gives you a 'big picture' view of your cardiovascular, metabolic, and hormonal health and how they interrelate. For example, you’ll be able to see how your cycle affects everything from stress to physical tenderness.

Petal is the first wearable built for a women's physiology, using the breast as a bio-marker for health data.

• Petal's unique form factor is comfortable for anytime wear, as it's fully discreet and invisible to others.
• Petal measures at the source of data origination for greater accuracy — right at the locations of heart, breast and thorax — compared to a distant extremity like a finger or wrist.
• Petal uses Bio-Impedance Analysis (BIA) as opposed to light or basal temperature input, which has the ability to get deeper insights for heart, breathing, cycle and body composition.

Petal utilizes eight advanced, clinical-grade Bio-Impedance Analysis (BIA) sensors. This technology safely measures your body's unique electrical resistance—the same safe, non-invasive technology found in high-end smart scales.

Your breast tissue is made of adipose (fat) tissue, which Petal's sensors can measure to understand your midsection and visceral fat percentages. We benchmark our midsection and visceral fat readings against smart scales to ensure that the trends you see in your Petal app are both consistent and clinically relevant. This allows you to mitigate metabolic health risks and inform sustainable, data-driven lifestyle changes, as well as support your fitness goals.  

Visceral fat (the fat surrounding your internal organs) is statistically highly correlated with cardiovascular wellness and health risks. Therefore, monitoring and reducing visceral fat can help with long-term wellness and disease prevention, especially post-menopause.

Most wearables require overnight wear because they use light-based (PPG) sensors on the wrist or finger, which are easily "noisy" or inaccurate during daytime movement. Petal takes a different approach:

• Precision Heart Metrics: Because Petal is positioned directly over the heart, its Bio-Impedance Analysis (BIA) sensors capture clear, direct signals that are generated when the heart beats. Unlike wrist-based trackers that struggle to capture accurate data with movement, Petal provides high-fidelity Heart Rate (HR) and Heart Rate Variability (HRV) data throughout your active day.
• Advanced Cycle Tracking: Petal doesn’t rely on morning basal temperature, which can be affected by sleep quality or environment. Instead, our BIA sensors monitor natural shifts in breast hydration and ductal tissue density. These changes are directly correlated with your cycle phases and symptoms (like breast tenderness), allowing for accurate tracking without the need for sleep-tracking.

Petal is designed to support women 18+, providing them with measurable health data related to their heart, mind, body and cycle.

Yes, Petal is one size. For the best accuracy, the sensors require snug contact with your body, so we recommend wearing Petal with a closer-fitting bra.

For the best accuracy, Petal's sensors require snug contact with your body, so we recommend wearing Petal with a closer-fitting support-top or bralette if a traditional bra is not for you.

Petal is designed for all-day comfort using premium, biocompatible materials. Our soft European-knit fabrics and polyurethane-coated interiors meet the OEKO-TEX Standard 100, ensuring every component is tested for harmful substances and safe for prolonged skin contact.

Petal’s sensors use a synthetic rubber coating that is medical grade and that contains no latex. However, if you have sensitivity to plastics, please note that Petal does include plastics that may come in contact with your skin.

To reduce the possibility of skin irritation we recommend:

1. Keep Petal clean by wiping it with an antibacterial wipe as needed 
2. Keep Petal dry by using a soft cloth to dry the device after workouts or heavy sweating.
3. Limit wear to a maximum of 16 hours per day.

Should any skin sensitivity occur, please discontinue use and consult a healthcare professional.

Yes. The electrodes need to make good contact with your body, so we recommend wearing Petal with a closer-fitting bra.

While Petal is safe to wear, we do not recommend wearing Petal when you are pregnant or breastfeeding, as changes in the fibroglandular tissue will cause the sensor readings to be inaccurate.

No, we do not recommend wearing Petal with implanted cardiac devices such as a pacemaker or ICD.

Yes, heart and mind metrics will function correctly; however, cycle and body composition metrics may be inaccurate.

Petal comes with two symmetrical thin bra inserts.

Petal’s sensors are only located on the left insert, as it’s closest to the heart. The right comfortable insert is included for balance and symmetry.

One of the core benefits of Petal is that it works with your existing schedule and wardrobe. While Petal captures meaningful data every time you put it on, we recommend wearing it whenever you wear a bra or close-fitting support top to build the most comprehensive picture of your health.  Consistent daily wear allows Petal to better understand your body’s natural fluctuations, identify long-term trends, and provide more personalized insights. 

However, whether you wear Petal every day or just during your workouts, you’ll still receive accurate snapshots of your health metrics whenever you choose to wear it.

Yes, Petal is water-resistant and will withstand sweat, but cannot be soaked or fully submerged in water.

Petal can be cleaned with any antibacterial wipe safe for use on the skin.

Petal offers up to 18 days of use on a single charge and recharges completely in under one hour via the included USB cord.

Absolutely! If you chose to sleep in a bra or support top where Petal's sensors can make close contact with your skin, Petal can monitor your health at night too.

Charger cords will be available for purchase on the site once Petal begins to ship.

Yes, Petal is guided by an unwavering commitment to the highest medical standards. Led by our Chief Medical Officer, Dr. Prionas—a breast radiation oncologist at one of the most prestigious medical institutions in the US—we ensure that clinical safety and medical accuracy are at the heart of every feature.

Petal uses advanced, medical grade bio-impedance sensors—the same safe, non-radiative technology trusted by medical professionals in clinical devices and BMI scales, but operating at significantly less power.

Additionally, Petal is crafted with premium, biocompatible materials, featuring soft European-knit fabrics and a polyurethane-coated interior that meets OEKO-TEX Standard 100 – a globally recognized certification ensuring they are tested for harmful substances and designed for safe, comfortable contact with your skin.

No, Petal functions entirely without WiFi or cellular radios.

No. Petal functions entirely without Wi-Fi or cellular radios, meaning it is free of the high-power radio frequency emissions found in many other wearables. It operates using low-power sensing technology that is completely free of ionizing radiation.

Yes, Petal uses Bluetooth® Low Energy (LE) technology, one of the safest wireless technologies available, for seamless communication with the Petal app. It operates at an incredibly low power level—significantly lower than typical smartwatches and fitness trackers.

You have complete control over your data, and we do not sell or share your information to third parties without your consent.

If you consent, we will utilize anonymized and obfuscated health and demographic data for research purposes only. This research will involve analysis of statistical trends concerning the development, diagnosis, and treatment of cancer, cardiovascular conditions, and other disease conditions. This data will be owned by Us, but you can opt out of providing further anonymized data at any time by navigating to your account settings once you receive the product, download the app, and set up your account.

Learn more in our Privacy Policy.

Yes, you can enable Petal's Incognito Mode on your Petal app. With this setting, your cycle data is used briefly to generate your health insights and is then automatically purged after viewing.

Your Petal membership is included with your purchase; there is no subscription needed—no ongoing costs or hidden fees.

Instructions will be included in the Quick Start Guide included in the box with your Petal.

The Petal App is compatible with iOS and Android.

Yes! You can choose to sync your data with Apple Health or Health Connect by Android in the Petal app.