Building a privacy-first period tracker in 2026 , how would you validate it?
Yoo!
I've been building Flowy, a privacy-first period and cycle tracking app for iPhone, and wanted to share it here as I get ready for launch.
The idea came from my girlfriend's being frustrated with existing cycle trackers: dense charts, alarmist notifications, and murky data practices.
Flowy is built around three things instead: quick, one-minute daily check-ins instead of endless fields to fill out, clear plain-language cycle and ovulation estimates instead of overwhelming graphs, and a strict no-data-selling policy, with full user control to export, reset, or delete your data anytime.
There's also a companion "Flowy Journal" with short, grounded articles on cycle basics and body literacy, aimed at being genuinely useful rather than SEO filler.
Right now I'm building in public and collecting early access sign-ups at flowyhealth.com before the iPhone launch. Would love feedback from this community, especially on positioning and how to talk about health-data privacy in a way that actually resonates rather than sounding like another disclaimer nobody reads.