Flo Health

Flo is a period, ovulation, pregnancy, and perimenopause tracking app used by 420M+ people worldwide, built with a 100+-person medical team and offering an AI-style Health Assistant chatbot and symptom checker. Founded in 2015, it became Europe’s first femtech unicorn in 2023 after a $200M round led by General Atlantic, though it also settled a 2021 FTC complaint and a related 2025 class action over past data-sharing practices with third parties like Meta.

Key features

• Cycle and symptom tracking with period/ovulation predictions
• Ovulation and fertility tracking with daily conception tips
• Week-by-week pregnancy tracker with milestones and checklist
• Perimenopause symptom support
• Flo for Partners: shares cycle/pregnancy updates with a partner
• Health Assistant chatbot with personalized, pattern-based tips
• Symptom Checker for conditions like PCOS and endometriosis (Premium; not available in UK/Europe)
• Anonymous Mode and Secret Chats community space

Strengths

• Massive scale: 420M+ downloads, 77M monthly active users, 4.8/5 App Store rating
• Large in-house medical review team (100+ doctors and health experts)
• Europe’s first femtech unicorn (2023), backed by a $200M round led by General Atlantic
• FSA/HSA payment eligibility for Flo Premium in the US
• Global reach: content in 20 languages, plus a Pass It On Project offering free Premium in underserved regions

Categories

• Cycle & Period Tracking
• Pregnancy & Postpartum
• Women's Health AI

Features

• Documentation
• Free
• Freemium
• Subscription