In an era of increasing concern about digital privacy, Flo Health’s Anonymous Mode stands as a beacon of innovation, earning recognition as one of TIME’s Best Inventions of 2023 while establishing new standards for protecting sensitive health data. The feature’s success offers a blueprint for how health apps can prioritize user privacy without sacrificing functionality.
When the U.S. Supreme Court overturned the right to abortion access in June 2022, fears arose that legislators might leverage companies’ data to track women’s reproductive health. In response, Flo launched Anonymous Mode in September 2022, which can “completely decouple health information from the identity of the user,” according to Chief Technology Officer Roman Bugaev.
The feature allows users to access Flo without sharing any information that identifies them – no name, email address, or technical identifiers. This means if Flo ever receives an official request to identify an Anonymous Mode user, it won’t be possible to satisfy that request. The technology was developed in collaboration with web infrastructure company Cloudflare, utilizing their Oblivious HTTP system.
“In an era where digital privacy often takes a backseat, Flo Health’s Anonymous Mode is a cornerstone of building a better future for female health,” the company stated. TIME’s recognition celebrated Flo’s commitment to protecting users’ privacy, with the feature being selected from over 2,200 entries for the prestigious award.
What makes Flo’s approach exceptional is their decision to open-source the technology. In June 2023, coinciding with the first anniversary of the overturning of Roe v. Wade, Flo shared the Anonymous Mode technology with the global femtech ecosystem. “Open-sourcing the technology behind Anonymous Mode is our contribution to the broader industry’s privacy measures,” the company explained after settling a privacy case.
Flo went even further by incorporating post-quantum cryptography into Anonymous Mode, thereby safeguarding sensitive health information from potential security risks posed by future quantum computers. This forward-thinking approach earned additional recognition, including the 2022 IAPP Privacy Innovation Award and finalist status for Fast Company’s 2023 World Changing Ideas Awards.
The technical implementation leverages sophisticated data governance. Flo uses Unity Catalog for fine-grained access controls throughout its data workflows, enabling Anonymous Mode while maintaining the app’s functionality. Nearly half of Flo’s employees actively use their data platform, demonstrating how privacy and utility can coexist.
The contrast with industry practices is stark. While Flo ensures that “no one (not even us!) can match your data to any personal identifiers,” many health apps continue to share user data with third parties, as legal proceedings revealed. Flo emphasizes that they have “never — and will never — sell your personal data,” and they are the first and only period tracker to be dual-certified in both ISO 27001 for Security and ISO 27701 for Privacy.
Roman Bugaev reflected on the achievement: “To have Anonymous Mode recognized in Fast Company’s Rapid Response category is a testament to both our partner, Cloudflare, and the Flo team’s dedication to creating a privacy-focused feature for women in America and around the world. We hope Anonymous Mode continues to set an example for the industry, especially as major tech companies face jury verdicts over privacy violations.
The privacy innovation hasn’t hindered Flo’s growth. The company’s Anonymous Mode feature was explicitly recognized in General Atlantic’s $200 million investment announcement, demonstrating that strong privacy practices can actually enhance rather than impede business success. With 76 million monthly active users, Flo proves that users will embrace platforms that genuinely protect their data.
The open-sourcing decision reflects Flo’s broader mission. Rather than treating Anonymous Mode as a competitive advantage, they’ve shared it to encourage industry-wide adoption. With health literacy “astonishingly low” – 58% of women are unaware of what a regular menstrual cycle entails – protecting the privacy of those seeking information becomes a public health imperative.
As data privacy concerns intensify and regulations tighten globally, Flo’s Anonymous Mode represents more than a feature – it’s a philosophy that prioritizes user trust and data protection as fundamental to the future of digital health. By winning TIME’s recognition while helping establish new industry standards, Flo demonstrates that privacy innovation can be just as important as innovation in health technology itself.
