In a world where women’s health often takes a backseat, Flo Health has flipped the script. This period-tracking app, emerging from London’s vibrant startup ecosystem, has become a global beacon for 80 million women. With a $1 billion valuation in 2024, Flo’s journey is a masterclass in grit, heart, and clever innovation. It’s not just about tracking cycles—it’s about giving women the tools to understand their bodies and take charge. From humble beginnings to unicorn status, Flo’s story is one of trust, community, and breaking taboos.
How did a small app become a femtech giant? Why do millions, from Mumbai to Miami, swear by it? Let’s unravel Flo Health’s tale—a vibrant mix of bold moves, user love, and a mission to change lives, one period at a time.
It all started in 2015 when Dmitry Gurski and his team spotted a gap. Women’s health was shrouded in mystery, with reliable information hard to find. They launched Flo Health as a simple period and ovulation tracker. No frills, just facts. Backed by $5 million in Series A funding in 2017, Flo began to grow. Its secret? A laser focus on women’s needs, backed by 120 doctors and health experts.
The app wasn’t just functional—it was personal. It tracked cycles, decoded hormonal shifts, and offered insights on conditions like PCOS or endometriosis. Women didn’t just use Flo; they trusted it. By 2021, Flo had 70 million monthly active users and a $50 million Series B round. It was clear: this wasn’t just an app—it was a revolution.
Flo’s rise wasn’t without hiccups. In 2021, a Federal Trade Commission settlement flagged concerns over data privacy. Flo didn’t shy away. Instead, they doubled down on trust, launching Anonymous Mode in 2022. This feature lets users access the app without linking personal details, earning a spot as one of TIME’s Best Inventions of 2023. It was a game-changer, especially after the U.S. Roe v. Wade reversal raised privacy fears.
Flo’s response showed its backbone. They partnered with Cloudflare to secure data and published a white paper detailing their tech.
Users noticed. “Flo feels safe,” said Priya, a user from Jaipur. By 2023, Flo boasted nearly 5 million paid subscribers. Their mantra? Listen to users, protect their data, and keep evolving.
In 2022, Flo took a leap that set it apart. The Pass It On Project was born, offering free Flo Premium subscriptions to women in 22 countries with limited access to health info. By 2024, it reached 18 million women across 66 countries, including 1.5 million in India. The project wasn’t about profit—it was about equity. “We want every woman to feel understood,” said Anna Klepchukova, Flo’s Chief Medical Officer.
This initiative struck a chord. In India, where 70% of women face menstrual health issues, as per a 2024 Femtech India study, Flo’s free tools made waves. From rural villages to bustling cities, women used Flo to track symptoms and ask questions they’d never voiced before. The project became Flo’s soul, proving they cared beyond the bottom line.
By July 2024, Flo Health hit a milestone that turned heads. A $200 million Series C round from General Atlantic pushed its valuation past $1 billion, making it the first purely digital women’s health app to achieve unicorn status. With gross bookings set to exceed $200 million in 2024, Flo’s growth was unstoppable.
What fueled this? Innovation with heart. Flo expanded beyond periods, adding tools for pregnancy, perimenopause, and menopause. Flo for Partners, launched in 2023, even helped partners understand reproductive health. With over 70 symptoms trackable and a private community for discussions, Flo became a one-stop shop.
India played a starring role in Flo’s story. With 1.5 million users by 2024, the country was a femtech hotspot. Flo partnered with FemTech India, a network of 125 innovators, to amplify its reach. Their collaboration shone during a 2024 Diwali campaign, where Flo’s Pass It On Project offered free Premium access to Android users nationwide. It wasn’t the campaign’s sparkle that mattered—it was the impact.
Navneet Kaur, FemTech India’s founder, saw the potential. “India’s ready for this revolution,” she said. Flo’s tools helped women navigate menstrual challenges, with 58% lacking basic period knowledge. From virtual workshops to social media buzz, Flo and FemTech India made health conversations feel natural, not taboo.
Flo didn’t chase trends—they set them. Their app’s design was clean, not cluttered. Messaging was warm, not clinical. “Flo gets me,” a user from London said. This relatability came from staying true to their mission: to empower women through knowledge. Unlike competitors like Clue or Glow, Flo blended science with empathy, backed by 120 medical experts.
Their marketing was equally sharp. Instead of jargon, Flo used clear, friendly language. Campaigns for Diwali leaned on cultural moments without feeling forced. Social media lit up with user stories—one woman shared how Flo helped her spot early PCOS signs, another praised its pregnancy tracker. These weren’t just reviews; they were love letters.
Flo’s community features sealed its success. Users could join private forums, ask questions, and share stories. This space turned strangers into allies. In India, where period talk is often hushed, these forums sparked a change.
FemTech India’s partnership amplified this. As India’s femtech scene grew—408 startups by March 2025—Flo tapped into local networks. Collaborations with health workshops and influencers made Flo a household name. Navneet Kaur’s vision of gender equity meshed perfectly with Flo’s, creating a ripple effect across the country.
Flo never stopped growing. Plans to expand into perimenopause and menopause care showed foresight. AI-driven insights gave users personalized tips, while Anonymous Mode kept privacy first. With new hires planned for Europe and North America, Flo’s R&D is set to soar. “We’re just getting started,” said Dmitry Gurski, Flo’s CEO.
The app’s versatility stood out. It supported 20 languages, tracked week-by-week pregnancy growth, and offered bite-sized health content. For women in underserved areas, free Premium access via Pass It On was a lifeline. Flo didn’t just sell subscriptions—it built trust, brick by brick.
Users say it’s the best.
These voices, from 70 million users, paint a picture of impact.
Roy Morgan’s trust polls don’t yet track femtech, but Flo’s user loyalty birds would. Flo’s mix of credibility and relatability makes it a standout. With 18 million women accessing free Premium tools, Flo’s influence is undeniable.
Flo Health didn’t just build an app—they built a revolution. From a 2015 startup to a 2024 unicorn, their journey is about empowering women. With trust, innovation, and a human touch, Flo turned periods into conversations and taboos into triumphs. As Dmitry Gurski said, “We’re creating a better future for female health.” That future is here, glowing brighter every day.
By MobileAppDaily Team 
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