A must-have for men who want to truly understand their partner's health
A lack of understanding about women's health often leads to friction in relationships. When a partner's fatigue, sensitivity, or mood swings keep recurring, someone inevitably says: "Why didn't you tell me?" or "Oh — was that the time of the month?" But there's something faster than words. Data.
Signaling is an app that helps couples share sensitive physical and emotional data — menstrual cycles, emotional fluctuations, contraception, sleep patterns — so they can tune into each other's rhythms and navigate their relationship with greater awareness. It's establishing itself as an emotion-driven platform that brings genuine connection and care to couples.
Signaling has shown growth potential comparable to relationship-centered messenger platforms like KakaoTalk, carving out an entirely new platform category — "couples healthcare" — through the novel intersection of women's cycle data and emotion-based communication.
Recently, Scarlett Joowon Jung, who has been leading this service from the beginning, was officially appointed Co-CEO of Vespexx. Vespexx, a subsidiary of in vitro diagnostics company Sugentech (CEO Mijin Son), announced the co-CEO structure as a declaration of its commitment to advancing technology-driven couples healthcare.
What Makes Signaling Different? Men Actually Use It.
One of Signaling's defining characteristics is the active participation of male users. Co-CEO Jung puts it this way: "Women's health isn't something women should have to manage alone. So many misunderstandings begin when health signals go unread. Even just a man being the one to suggest using Signaling can itself be a signal of care for his partner's health."
Signaling comes equipped with a couples calendar, daily emotional check-ins, contraception tracking, a private messenger, and home screen widgets. Once two people install the app and connect as a couple, just 10 seconds of daily emotional and physical logging begins to reveal rhythm patterns within two weeks.
And that's when things start to change. Date quality improves — on tired days, plans shift naturally toward rest and recovery instead of pushing through. Arguments decrease, because now there's context. On sensitive days, a partner can dial back the conversation and lean into warm, quiet gestures instead. Anniversary management becomes foolproof — the D-day widget keeps gift and event prep on track. Contraception becomes a shared responsibility, with timing discussed naturally and openly.
Whether it's a long-distance couple, busy working professionals, live-in partners, or an engaged couple preparing for marriage — Signaling reduces repeated misunderstandings and builds a predictable "care routine" into the relationship.
"Technology That Started in My Own Body" — The Story of Scarlett Joowon Jung
Co-CEO Jung originally aspired to be a professional golfer. Her years as an athlete made her acutely attuned to injury management and physical conditioning — an experience that became the seed of her serial entrepreneurship in wellness and healthcare.
After leaving sports, she enrolled at Ewha Womans University, where she developed her financial independence through scholarships, tutoring, and producing economics study guides. She founded a women's entrepreneurship club at Ewha, and some of those original members are still part of the Signaling team today.
Jung later moved to the United States to work in the NGO sector, engaging with fundraising organizations supporting multicultural women and single mothers. It was there that a female CFO mentor said something that changed her life: "Get out of your safe zone."
From that point on, she immersed herself in networking events, sharpening her community-based business instincts. Back in Korea, she created a women's comprehensive healthcare app called Dalchaebi, then joined venture capital firm Yellowdog, where she analyzed countless startup pitches and began designing the foundational architecture for a healthcare platform.
In her early entrepreneurial experiments, Jung also ran a lunch date app, a romantic venue recommendation platform, and an emergency contraception delivery service. Through it all, she arrived at a core insight: "Shared value comes from human instinct." And with that: "I knew I could make money, but I wanted to find something I could do for the rest of my life."
From Dalchaebi to Signaling — The Start of a Global Platform Built to Read Couples' Rhythms, Together with Sugentech
Before Signaling, Jung built Dalchaebi out of a desire to create a platform that truly understood women's bodies. Dalchaebi was an AI-powered menstrual pattern and routine analysis app with a community focus, designed to help women live and work with greater vitality. After her VC career, she recognized that over 68% of the women's health market is actually shared with men — spanning vertical wellness areas like contraception and pregnancy — and that engaging couples together offered far stronger motivational pull. That insight became the foundation for her second venture: Signaling.
The pivotal moment that launched Signaling was her meeting with Mijin Son, CEO of Sugentech. Sugentech is a specialized in vitro diagnostics company founded as a spin-off of the ETRI Holdings research institute, and was one of the driving forces behind the global K-diagnostics wave during the COVID-19 pandemic. The company's particular strength lies in its integrated device and platform approach to women's healthcare — covering hormonal diagnostics, women's disease detection, prevention, and care.
Sugentech CEO Mijin Son shared Jung's philosophy that "women's bodies and couples' relationships need to be decoded through data," and the two found common ground in the potential to combine Sugentech's diagnostic technology with Signaling's user-centered platform to expand the healthcare data ecosystem.
Today, Signaling has established itself as a comprehensive couples healthcare platform managing menstruation, emotions, contraception, and mental health in one place. Since its CES 2025 debut, the company has stacked up a series of meaningful milestones: the CES AI Wellness Top 111 Innovation Award, 500,000 cumulative downloads, a 2 billion KRW Pre-A funding round, and growing B2B partnerships in Japan and North America.
Co-CEO Jung reflects: "Signaling isn't just an app — it's the narrative of my life, a platform built from the accumulated advice of the mentors who helped me grow. Going forward, I'll keep making the technology more precise: understanding women's rhythms, and co-designing the emotional arc of couples' lives."
You no longer have to navigate relationships on instinct alone. Emotions, health, date planning, contraception — if you want to truly sync with your partner's rhythm, trade guesswork for data. For any man who wants to be thoughtful and intentional in his relationship, there's one app that belongs front and center on your home screen: Signaling.
Original Article By:
Aving Global News Network
The content has been translated and edited from the original article.
