For centuries, women have relied on instinct to navigate their health. Yet, traditional healthcare and technology have often failed to validate that intuition. Petal is the layer between instinct and insight, a first-of-its-kind wearable designed to bridge the gap between subjective experience and objective, clinical-grade data specifically for women’s physiology.
While the women’s health market is projected to reach over $58 billion by 2029, investment has historically been scarce, capturing only 6% of private healthcare funding (Source: World Economic Forum). This has left a massive space for innovation that truly addresses female physiology. Petal fills this void by moving beyond the wrist and the calendar app to monitor health at its source.
Heart Health: Accuracy at the Source of Origination
Traditional wearables rely on signals from the wrist or finger, which can be prone to noise and inaccuracy due to movement and distance from the source of the data (the heart).
The Petal difference: Petal is a discreet bra insert positioned directly over the heart and thorax. By measuring at the source of origination, Petal captures high-fidelity cardiovascular signals (ECG/EKG) and Heart Rate Variability (HRV) with accuracy verified against FDA-approved devices.
Why it matters: Cardiovascular disease is the leading cause of death for women globally, yet symptoms are often misunderstood or misdiagnosed because clinical standards were historically based on male physiology. Petal provides the tailored, continuous monitoring necessary to close this gender data gap.
Cycle Health: Biology Over Algorithms
Most current cycle tracking relies on manual logging or algorithms that estimate ovulation based on calendar dates, methods that studies show can be inaccurate for many women. Others rely on basal body temperature, which requires strict morning routines and can be disrupted by sleep quality or environmental factors.
The Petal difference: Petal utilizes Bio-Impedance Analysis (BIA) sensors to measure natural shifts in breast tissue density and hydration. Breast tissue changes naturally with your hormones, making it a great indicator of the menstrual cycle, independent of temperature or manual input.
Why it matters: Petal can create a personalized baseline built from her individual physiology, not a generic population average.
Body Health: Metabolic Insight
Weight is a single number that often hides the truth about metabolic health. For women navigating weight management—whether through lifestyle changes, GLP-1 medications, or life stages like menopause—understanding body composition is often more valuable than tracking pounds alone.
The Petal difference: Because Petal sits against breast tissue, which is composed of adipose (fat) tissue, it can accurately measure a user’s midsection fat percentage. This also provides insight into unsafe visceral fat.
Why it matters: Monitoring these levels gives women a clear view of their metabolic health, indicating whether they're actually losing fat or just losing muscle and providing a "big picture" view of how their hormones play a role. Visceral fat, invisible to the eye, is the "active" fat stored around internal organs like the heart and liver; giving women early insight into potential cardiovascular and metabolic risks.
The Mind: Monitoring Stress
Stress is not just a feeling; it's a physical reaction controlled by the nervous system. While Heart Rate Variability (HRV) is the gold standard for measuring the body's resilience and adaptability to stress, capturing it accurately requires precision that wrist-based devices often struggle to maintain due to statistical noise.
The Petal difference: By sitting directly over the heart and thorax, Petal captures precise signals of stress at the source of origination. This allows for the collection of precise ECG/EKG and HRV data throughout the active day, without the need for overnight wear.
Why it matters: By determining each user's baseline, Petal provides actionable insights when stress levels deviate from the norm. By tracking heart, cycle, and body changes, it helps women visualize exactly how hormones, stress and physical symptoms are connected. It validates subjective feelings of fatigue or resilience with objective physiological proof, helping women understand why they feel the way they do.
Petal is Invisible and Easy-to-use
In today's world, we're surrounded by apps that demand our attention and manual entry. And user fatigue is real. Women want health insights without the mental load of being a full-time data analyst.
The Petal difference: Petal is the Invisible Layer. It is designed to disappear into a woman's daily routine, gathering valuable data without requiring overnight wear or constant interaction. It translates complex physiological signals like metabolic health (through midsection fat) and cycle phases into simple, actionable clarity.
The Result: a discreet, comfortable, and safe wearable made just for women.
Petal Keeps Data Private
In a world where so much of our data is online, trust in digital health tools is a point of concern for many women. One-third of women have expressed concern about data privacy regarding period tracking apps, and many remain unsure how to protect their reproductive data.
The Petal Difference: Petal treats data privacy with the same care as physical health. Users can enable Petal's Incognito Mode in their Petal app. With this setting, cycle data is used briefly to generate health insights and is then automatically purged after viewing.
The Result: A private and trustworthy health tracking app experience.
Why Women Love Petal
Petal is not just another health tracker; it is the trusted layer that validates what women have always known. By combining medical-grade sensors with a design built for the female body, Petal transforms intuition into evidence-based confidence, empowering women with the data they’ve never had from the body they’ve always known.