Ultrahuman, a global leader in wearable health technology, today announced its acquisition of viO HealthTech and the launch of Cycle & Ovulation Pro for Ultrahuman Ring AIR.
Rolling out now in the USA, UK, EU, Australia, and Canada as a groundbreaking new plug-in for Ultrahuman Ring AIR, Cycle & Ovulation Pro boasts best-in-class 90%+ accuracy for ovulation confirmation.
Most menstrual tracking platforms are built for women with regular 28-day cycles. In reality, the majority have diverse cycle patterns – and those with conditions like non-bleeding, PCOS, endometriosis or thyroid disorders often don’t get an accurate or supportive experience. Ultrahuman’s acquisition of viO is designed for them.
Cycle & Ovulation Pro leverages an adaptation of viO’s OvuSense™ technology, taken from its class II medical device fertility and cycle monitor, and reconfigures it for consumer wellness tracking. The OvuSense™ technology was developed over 15 years, trained on a dataset of over 260,000 cycles collected with medical-grade sensors, and validated in 13 peer-reviewed clinical publications.1
Cycle & Ovulation Pro features:
Cycle & Ovulation Pro is designed for the reality of human biology – not the hypothetical 28-day cycle. It complements Ultrahuman Ring AIR’s existing free Cycle & Ovulation PowerPlug and adapts to the variability women experience throughout their lives, offering personalised wellness insights that reflect actual data rather than assumptions.
The most accurate cycle tracking on a ring (>90% accuracy): Validated through rigorous equivalence testing using both LH and progesterone rise2, building on prior OvuSense™ clinical studies3, now adapted for wellness.
Fertility planning support for all women: Guidance for women with a wide range of cycle types, providing highly accurate ovulation confirmation.
Cycle Flags™: Uses your temperature data to suggest hidden patterns supporting better personal understanding of cycle variability. Trends include early or late ovulation, short luteal phase, the absence of ovulation, and proprietary patterns that may be related to conditions like PCOS or miscarriage risk.4
Designed for diverse cycles: Works reliably for 87% of women who don’t have a textbook 28-day cycle – including those with PCOS or endometriosis – in tracking and understanding their cycles.
Symptom and lifestyle tagging: Enables women to log mood, symptoms, and behaviours in relation to cycle phases to help identify longer-term personal wellness trends.
“This collaboration benefits from 15 years of clinically proven women’s health expertise and applies it to the world’s lightest smart ring. For the first time, best-in-class hardware, software, and algorithms with a clinical background come together in one wellness device. Our mission is to give women cutting-edge tools to optimise their health, combining clinical technology with comfort and style to deliver the most accurate women’s health tool available,” said Mohit Kumar, CEO of Ultrahuman.
“Wearables will shape the future of health”, said Rob Milnes, CEO of viO HealthTech. “We’re delighted to be able to bring OvuSense women’s health insights to a significantly wider audience via the Ultrahuman Ring AIR.”
Cycle and Ovulation Pro uses an adapted temperature-sensing algorithm originally developed for viO’s OvuSense™ fertility monitors. When applied to the Ultrahuman Ring AIR, it enables adaptive, cycle-aware tracking via the finger for consumer wellness tracking.
It allows for personalized insights that adapt over time – enabling a better understanding of how individual cycles evolve across life stages and contexts.
Unlike traditional period trackers, which rely on static averages and calendar-based predictions, Cycle & Ovulation Pro collects physiological patterns and temperature biomarkers captured passively via the Ultrahuman Ring AIR – framing this clinically validated heritage as a wellness feature for everyday use.
Cycle & Ovulation Pro is powered by the OvuSense™ technology – a fertility tracking platform with 15 years of clinical research and trusted by physicians.
Cycle & Ovulation Pro PowerPlug is available to Ring AIR users from 15 August in the USA, UK, EU, Australia and Canada for $3.99 per month or $39.99 annually. Other regions will follow. The existing Cycle and Ovulation PowerPlug remains free to use and continues to offer foundational tracking tools.
Ultrahuman is a global health technology company developing cutting-edge wearables and intelligent software to help users optimize sleep, recovery, movement, and reproductive awareness. The company’s flagship product, the Ultrahuman Ring AIR, delivers personalized insights through modular in-app features known as PowerPlugs – enabling users to take control of their health, one physiological signal at a time.
