HeySis: Cycle & Period Tracker

HeySis is a period and cycle tracker that feels less like an app and more like texting an older sister who remembers your cycle, your mood, and how you actually feel. Open it and she just asks: “Hey! How are you today?” Most trackers give you charts. HeySis gives you someone to talk to. Meet Mia, your AI companion who knows where you are in your cycle and explains what’s going on in plain, human words — no hormone lectures, no pressure. WHY WOMEN KEEP HEYSIS • A warm daily check-in instead of a 20-field form. • Mia, an AI friend you can actually chat with about your period, mood, PMS and body. • “This is normal” — honest reassurance, and a gentle nudge to see a doctor when something truly deserves a look. • Private by design: your cycle data is yours. Stored on your device, heading toward end-to-end encryption. No ads, never sold. CYCLE & PREDICTIONS • Period start, length, cycle history and regularity. • Predictions for your next period, ovulation and the fertile window. • Late days handled calmly — no panic. • A phase calendar — menstrual, follicular, ovulation, luteal — so “off” days finally make sense. LOG IN ONE TAP • Period and flow — one tap from the home screen. • Mood,