Ireland-based Peri has launched a wearable device purpose-built for perimenopause – a small, lightweight sensor worn under the breast that continuously tracks biometrics including vasomotor symptoms like hot flashes and night sweats. The device is available now at $449 with no subscription or recurring fees, and is FSA/HSA-eligible.
The placement is a deliberate design choice. Unlike wrist-based or ring devices, the under-breast positioning allows for more accurate capture of the vasomotor symptoms that define much of the perimenopause experience. The company spent five years building its AI platform from scratch, with every algorithm trained exclusively on continuous data collected from women in perimenopause. A companion app translates raw data into a detailed picture of how symptoms, sleep, mood, and activity levels connect, delivering personalized insights on weekly, monthly, and cyclical timelines.
“We built Peri because women deserve to see what’s actually happening in their bodies, not second-guess their own experience or rely on a system that wasn’t built for them,” said co-founder and CEO Heidi Davis. “With Peri, they can make informed decisions about their care, see whether a treatment is actually working, and take real control of their health.”
Perimenopause remains one of the least researched areas of medicine. Most doctors receive between zero and two hours of menopause training. Of the 60% of women who seek clinical help, 70% leave without answers. There are no standardized biomarkers and no objective way to measure how perimenopause evolves – which is what makes the data Peri is collecting potentially significant beyond individual symptom tracking.
The company says it is building the first large-scale dataset on perimenopause, with the longer-term vision extending beyond symptom management. Perimenopause is a physiological turning point associated with long-term outcomes in cardiovascular health, bone density, and cognitive function – and comprehensive longitudinal tracking could identify risk factors years before they become conditions.
Peri was founded in 2021 by scientist Heidi Davis and physiologist Dr. Donal O’Gorman.
