Flo (app)

Flo Health, Inc. was co-founded in 2015 by Dmitry and Yuri Gurski, in Belarus.^[1] Their backgrounds helped build the first version of the software having experience in other fitness and health apps.^[2] Dmitry serves as the company's CEO.^[3] The company's development hubs are in London, Amsterdam and Vilnius.^[4][5]

In 2016, the company raised $1 million in seed round funding from Flint Capital and Haxus Venture Fund.^[6] In 2017, Flo received an investment of $5 million from Flint Capital and model Natalia Vodianova with Vodianova helping develop an awareness campaign for the company.^[1][7] In 2018, Flo received an investment of $6 million from Mangrove Capital Partners, with participation from Flint Capital and Haxus, giving the company a valuation of $200 million.^[8] In mid-2019, Flo received an additional investment of $7.5 million led by Founders Fund.^[9]

In 2020, the Federal Trade Commission alleged that Flo had misled users about its handling of health information to third parties including Google, Facebook, AppsFlyer, and Flurry since 2016.^[10][11] These allegations followed a 2019 report by The Wall Street Journal in reference to Facebook.^[12][13][14] The company reached a settlement in 2021 and was required to notify users of how their personal information was shared and obtain permission before any further information was shared.^[15][16] The agreement also required that Flo to undertake an independent privacy audit which it completed in March 2022.^[14][17][10] In early September 2021, Flo announced it closed $50M in a Series B financing, bringing the total capital raised to $65 million and company valuation to $800M led by VNV Global and Target Global.^[18][19]

In March 2024, the Supreme Court of British Columbia certified a class action suit against Flo for sharing intimate data with Facebook and other third parties without user knowledge.^[20] In July 2024, Flo announced it raised more than $200M in Series C financing from General Atlantic bringing its valuation beyond $1 billion.^[21][22][23] As of November 2024, the app had over 380 million downloads world wide, and over 70 million monthly active users.^[24]

In 2025, Flo adopted a data intelligence platform from Databricks to power its analytics and AI features, allowing users personalized cycle predictions.^[25] In 2025, a class action lawsuit in California was settled for $56 million with Flo paying $8 million and Google paying $48 million.^[26][27]

Flo was initially created as a period and ovulation tracking application. It now provides reminders of upcoming menstrual cycles and a place to record various other health symptoms such as contraceptive methods, vaginal discharge (leukorrhea), water intake, pains, mood swings, and sexual activity.^[28] The application is available on iOS and Android.^[29]

Flo is free to download and the free basic version gives you access to period and ovulation tracking and predictions, symptom tracking, cycle history, and anonymous mode.

In Pregnancy mode, the app provides tracking features and educational material for pregnancy.^[30]

In October 2023, Flo launched Flo for Partners, a feature that allows users to share their Flo data with their partner.^[31]

In September 2022, as a response to Roe v. Wade being overturned, Flo sped up the release of a feature called "Anonymous Mode". Flo said this mode allows users to access the app without any personal identifiers such as name, email address, or technical identifiers being associated with their health data.^{[32][33][34][35]} Flo said it uses a technology called Oblivious HTTP to help protect user privacy in Anonymous Mode.^[33]

Flo was named to Bloomberg’s Top 25 UK Startups to Watch for 2024.^[36]

Flo's Anonymous Mode feature was recognized on both Fast Company's World Changing Ideas 2023^[37] and TIME's Best Inventions List 2023.^[38]

Flo is a CES 2019 Innovation Awards Honoree in the Software and Mobile Applications category.^[39]