Flo Period & Pregnancy Tracker

Flo Period & Pregnancy Tracker, with over 380 million downloads, is the most-used reproductive health app worldwide, offering an AI-powered chatbot that answers pregnancy questions instantly based on 200,000 research papers. Its seamless transition from period to pregnancy mode ensures continuity, and its anonymous mode—launched after privacy concerns—allows tracking without an account, a critical feature in the post-Dobbs era. This privacy-first approach is 50% more flexible than #2 What to Expect, which requires account creation, setting a benchmark for user security.