Peri: First Wearable Device Purpose-Built for Perimenopause Symptom Tracking

A palm-sized adhesive sensor worn on the upper abdomen that continuously tracks hot flashes, night sweats, anxiety, sleep patterns, menstrual cycles, and activity levels to give women objective biometric data during the perimenopause transition, priced at $449 with no subscription.

Presented By Our Partners

Perimenopause, the transition period leading to menopause, affects virtually every woman between the ages of 40 and 55, yet remains one of the most poorly tracked and clinically underserved health transitions. The hormonal fluctuations that characterize perimenopause drive a constellation of symptoms including hot flashes, night sweats, sleep disruption, mood changes, and irregular menstrual cycles, but the subjective and episodic nature of these symptoms makes them difficult to document, quantify, and communicate to healthcare providers. A 2023 systematic review published in Menopause by Hickey et al. found that the average woman experiences perimenopause symptoms for 7 to 10 years, yet most women report that their symptoms are dismissed, minimized, or inadequately addressed by healthcare providers, partly because patient-reported symptom diaries are unreliable and subjective (DOI: 10.1097/GME.0000000000002154).

A 2022 study published in Nature Aging by Santoro et al. examined the physiological mechanisms underlying menopausal vasomotor symptoms (hot flashes and night sweats), identifying hypothalamic neurokinin B/kisspeptin neurons as key mediators that respond to declining estrogen levels. The study emphasized that objective measurement of vasomotor symptoms through skin temperature, heart rate, and galvanic skin response provides more accurate symptom quantification than self-report alone (DOI: 10.1038/s43587-022-00194-3). The Peri wearable, developed by IdentifyHer, enters this gap as the first wearable device purpose-built for tracking perimenopause symptoms through continuous biometric monitoring.

What Is the Peri Wearable?

Peri is a wearable biometric sensor developed by IdentifyHer, an AI-powered women’s health company, designed specifically for tracking perimenopause symptoms through continuous physiological monitoring. The device is a palm-sized sensor that adheres to the user’s upper abdomen (worn under the breast using medical-grade adhesive) and continuously tracks hot flashes, night sweats, anxiety markers, sleep patterns, menstrual cycles, and physical activity levels.

Unlike general-purpose fitness trackers that are worn on the wrist and adapted for women’s health as a secondary feature, Peri was engineered from the ground up for the perimenopause use case. The torso placement is deliberate: skin temperature changes associated with hot flashes are most pronounced on the trunk, where the core body temperature spike that drives vasomotor symptoms radiates outward. Wrist-based temperature sensors can detect hot flashes but with reduced sensitivity and greater lag compared to trunk-mounted sensors closer to the core.

The device features two removable and rechargeable batteries designed for seamless swap-out so that data collection is never interrupted. This dual-battery system means one battery can charge while the other powers the device, eliminating the data gaps that occur when typical wearables must be removed for charging.

Peri’s companion app processes the continuous biometric data to provide objective insights about symptom frequency, severity, timing, and correlation with lifestyle factors. The goal is to transform the subjective experience of perimenopause (“I think I’m having more hot flashes lately”) into objective, quantifiable data (“You had 14 vasomotor events this week, a 30% increase from last week, concentrated between 2 AM and 4 AM”).

The device was named a CES Innovation Award Honoree in 2025 and launched commercially in 2026 at $449 with no subscription or recurring fees. It is FSA and HSA eligible.

The Science Behind Perimenopause Biometric Tracking

Hot flashes, the hallmark symptom of perimenopause and menopause, are thermoregulatory events triggered by dysfunction in the hypothalamic temperature control center. As estrogen levels decline during perimenopause, the thermoneutral zone (the range of core body temperatures that the hypothalamus considers normal) narrows dramatically. Small fluctuations in core temperature that would normally go unnoticed trigger a full thermoregulatory response: peripheral vasodilation (blood rushing to the skin surface), sweating, and the subjective sensation of intense heat.

These events produce measurable physiological signatures: rapid skin temperature elevation (typically 1 to 4 degrees Celsius at the skin surface), increased heart rate, changes in skin conductance (from sweating), and movement disruption (from the discomfort of the event). Continuous monitoring of these parameters can objectively detect, quantify, and timestamp vasomotor events with greater reliability than self-report.

Night sweats, which are vasomotor events occurring during sleep, are particularly difficult to track through self-report because they may partially awaken the sleeper without full consciousness. Continuous torso-based monitoring can detect these events even when the woman does not fully awaken, providing a more complete picture of nocturnal symptom burden and its impact on sleep architecture.

The correlation between vasomotor symptoms and sleep disruption is clinically significant. Research published in the Journal of Clinical Endocrinology and Metabolism has established that objectively measured hot flashes during sleep account for a substantial proportion of the sleep fragmentation experienced by perimenopausal women, and that treating vasomotor symptoms improves sleep quality independently of other sleep interventions.

Anxiety, another common perimenopause symptom, can be inferred from autonomic markers including heart rate variability, skin conductance, and respiratory rate changes. While no consumer device can diagnose anxiety, continuous autonomic monitoring can identify periods of elevated physiological stress that correlate with subjective anxiety, providing data for conversations with healthcare providers.

What the Peri Wearable Does Well

The purpose-built design for perimenopause is Peri’s fundamental advantage. General-purpose wearables treat women’s health features as add-ons to a primarily fitness-oriented platform. Peri’s entire sensor placement (torso), form factor (adhesive patch), data analysis pipeline, and user interface are optimized for the specific physiological events that characterize perimenopause. This specialization should translate to better sensitivity and specificity for vasomotor event detection compared to wrist-based alternatives.

The torso placement provides superior hot flash detection. The trunk is where vasomotor events originate (through core body temperature dysregulation) and where skin temperature changes are most pronounced. Wrist sensors measure a peripheral signal that arrives with a delay and reduced amplitude. By placing the sensor closer to the source, Peri can potentially detect events earlier, more accurately, and with greater sensitivity for milder events that wrist sensors might miss.

The dual-battery system with hot-swappable batteries is a thoughtful engineering decision that addresses a real problem: continuous monitoring requires continuous wear, and charging breaks create data gaps. For perimenopause tracking, where symptom patterns unfold over weeks and months and where nighttime data is particularly valuable, uninterrupted 24/7 monitoring provides a more complete clinical picture.

Featured Partner

Invest in the Infrastructure Behind Modern Medicine

As healthcare expands beyond hospital walls, the buildings and campuses supporting that shift are generating compelling returns for investors who move early. The Healthcare Real Estate Fund offers qualified investors direct access to a curated portfolio of medical office, outpatient, and specialty care facilities.

Learn More →

The objective data output transforms healthcare conversations. Women frequently report that their perimenopause symptoms are dismissed or inadequately addressed by healthcare providers. Arriving at a medical appointment with weeks of objective biometric data documenting the frequency, severity, and timing of vasomotor events provides evidence that subjective reports alone cannot match.

The $449 price with no subscription and FSA/HSA eligibility makes the investment recoverable through pre-tax health spending accounts, reducing the effective cost for many users.

Pricing, Access, and Practical Realities

Peri is priced at $449 and available for purchase at myperi.co. No subscription or recurring fees are required for full access to the companion app, data analytics, and symptom tracking features. The device is FSA and HSA eligible, allowing users to purchase with pre-tax health savings funds.

For comparison, general-purpose wearables with some women’s health features range from $99 (Fitbit) to $449 (Apple Watch Ultra 2). The Oura Ring 4 ($349 plus $6/month subscription) offers menstrual cycle tracking through temperature monitoring but not targeted perimenopause symptom tracking. No direct competitor offers a purpose-built perimenopause monitoring device at any price point.

The adhesive wear method requires ongoing replacement of adhesive patches or strips (details on adhesive replacement cost and frequency have not been extensively publicized). Users with sensitive skin should evaluate the adhesive compatibility, as continuous torso adhesion can cause irritation in some individuals.

The device is worn under clothing and is designed to be discreet. The palm-sized form factor is smaller than a smartphone but larger than most wrist-worn wearables, and the adhesive attachment means it must be positioned consistently on the upper abdomen for reliable sensor readings.

Who It Is Best For

Peri is best suited for women experiencing perimenopause symptoms who want objective, continuous data about their physiological changes. Women in the early stages of perimenopause, when symptoms may be intermittent and confusing, particularly benefit from objective tracking that can confirm and quantify what they are experiencing.

Women who have felt dismissed by healthcare providers when reporting perimenopause symptoms gain an evidence tool. Objective biometric data documenting vasomotor events, sleep disruption, and symptom patterns provides clinical-grade documentation that supports more productive healthcare conversations and treatment decisions.

Women considering hormone replacement therapy (HRT) or evaluating the effectiveness of current treatment benefit from continuous baseline and follow-up data. Quantifying symptom frequency and severity before and after treatment initiation provides objective evidence of therapeutic response.

Women who want to understand the relationship between their lifestyle choices (exercise, nutrition, stress management, sleep habits) and their perimenopause symptoms can use Peri’s longitudinal data to identify patterns and triggers that self-report alone cannot reliably capture.

The device is less suited for women who prefer wrist-based wearables for comfort, for those who find adhesive patch devices uncomfortable or impractical for their lifestyle, or for women seeking general fitness tracking rather than perimenopause-specific monitoring.

How It Compares

Against the Oura Ring 4 ($349 + $6/month), which offers temperature-based menstrual cycle tracking, Peri provides dedicated perimenopause symptom monitoring with torso-based sensors optimized for hot flash detection. Oura tracks temperature from the finger as one feature among many; Peri tracks vasomotor events from the trunk as its primary purpose.

Against the Apple Watch (various models), which offers cycle tracking and general health monitoring, Peri provides purpose-built perimenopause tracking with sensor placement and algorithms specifically designed for vasomotor symptom detection. Apple Watch is a general-purpose smartwatch; Peri is a specialized health monitoring device.

Against symptom diary apps (free to $10/month), Peri adds objective biometric measurement to the subjective symptom logging that apps provide. Apps rely on the user remembering to log symptoms accurately; Peri detects and records events automatically through continuous sensor monitoring.

No other commercially available wearable device is purpose-built for perimenopause symptom tracking, making Peri unique in its category.

Limitations and Open Questions

The torso-adhesive form factor may not suit all users. Adhesive wear can cause skin irritation, particularly with extended continuous use. Active individuals may find the patch shifts during intense exercise. The visibility of a patch under certain clothing may be a concern for some users.

Clinical validation data for Peri’s vasomotor event detection accuracy has not been extensively published in peer-reviewed literature. While the CES Innovation Award recognition and the device’s physiological rationale are promising, independent validation against clinical reference standards (such as ambulatory skin conductance monitoring used in research settings) would strengthen confidence in the device’s measurement claims.

The device tracks symptoms but does not treat them. Women experiencing significant perimenopause symptoms should use Peri’s data to inform conversations with healthcare providers about treatment options rather than as a substitute for medical evaluation.

Adhesive replacement costs and long-term wear comfort data are not extensively documented. The total cost of ownership over months of use will depend on adhesive patch pricing and replacement frequency.

The companion app’s data analysis and insight generation capabilities will significantly influence the device’s practical value. Raw biometric data is useful primarily when translated into actionable insights, and the quality of this translation depends on the app’s algorithms and user interface design.

What This Means for Your Health

Perimenopause is not a disease but a natural physiological transition, yet its symptoms significantly impact quality of life, sleep, mental health, and long-term health trajectories for the majority of women who experience them. The ability to objectively track these symptoms transforms perimenopause management from reactive (responding to symptoms after they become disruptive) to proactive (identifying patterns, optimizing lifestyle interventions, and making evidence-based treatment decisions).

Within Healthcare Discovery‘s Five Pillars framework, perimenopause intersects with all five pillars: Sleep (night sweats disrupt sleep architecture), Movement (symptom patterns may vary with exercise timing and intensity), Nutrition (dietary factors can modulate vasomotor symptom severity), Breathwork (stress and autonomic regulation affect symptom frequency), and Mindset (the psychological impact of perimenopause is substantial and underaddressed).

The broader significance of Peri lies in its validation of women’s health as a category deserving purpose-built technology rather than afterthought features on general-purpose devices. The $80 billion wearable technology market has historically been designed around male physiological patterns, with women’s health features added as secondary capabilities. Peri represents a category-creating approach: starting with a specific women’s health need and engineering a device around it.

For the estimated 1.3 billion women worldwide who will experience menopause by 2030, technologies that quantify, validate, and support the perimenopause transition fill a genuine gap in health technology and healthcare delivery.

Frequently Asked Questions

What is the Peri wearable?
Peri is the first wearable device purpose-built for perimenopause symptom tracking, developed by IdentifyHer. It is a palm-sized adhesive sensor worn on the upper abdomen that continuously tracks hot flashes, night sweats, anxiety markers, sleep patterns, menstrual cycles, and activity levels through biometric monitoring.

How much does Peri cost?
Peri is priced at $449 with no subscription or recurring fees. All data analytics and app features are included. The device is FSA and HSA eligible, allowing purchase with pre-tax health spending accounts.

How does Peri track hot flashes?
Peri uses sensors placed on the upper abdomen (trunk) to detect the skin temperature elevations, heart rate changes, and other physiological signatures associated with vasomotor events. The torso placement provides superior hot flash detection compared to wrist-based devices because the trunk is where vasomotor events originate and produce the most pronounced temperature changes.

Is Peri FDA approved?
Peri is sold as a consumer wellness device. It was named a CES Innovation Award Honoree in 2025. The device provides biometric data for personal health tracking and healthcare provider conversations, not for medical diagnosis.

Who should use Peri?
Peri is designed for women experiencing or entering perimenopause who want objective data about their symptoms. It is particularly valuable for women who want to document symptoms for healthcare conversations, evaluate the effectiveness of treatments, or understand how lifestyle factors influence their perimenopause experience.

Free Daily Briefing

The Latest Longevity Science.
Delivered Every Morning.

Join researchers, physicians, and health professionals getting daily breakthroughs in AI-driven medicine, epigenetics, and longevity research.

Support the research that powers this editorial

Subscribe Free

No spam. Unsubscribe anytime. We respect your inbox.