PhaseDay: Cycle Signals

PhaseDay connects your cycle phase to your wearable data — so you finally understand why your HRV tanks, your energy crashes, and some weeks you can do anything while others you can barely function. Most wearables were built on male-dominated datasets. They do not model your cycle. So every month, your scores tank, your readiness goes red, and the app tells you to rest more, train less, sleep better. You are already doing everything right. The algorithm just does not know you are premenstrual. PhaseDay fixes that. • Phase-aware wearable context — when your HRV drops on day 26, PhaseDay tells you why, not just rest more • Daily capacity planning — know your energy and cognitive load budget before your day starts • Cycle-informed scheduling — plan your hardest work for your peak window, protect your lowest days • HealthKit integration — syncs sleep, HRV, recovery, strain, and readiness from Apple Health • Bilingual — full English and Chinese support Built for women who already track everything — and still feel blindsided. SUBSCRIPTION / PAID FEATURES: PhaseDay PRO is an optional auto-renewable annual subscription. A free trial may be available. Payment is charged to your Apple ID account after the trial ends (or at purchase if no trial applies). Manage or cancel anytime in iOS Settings → Apple ID → Subscriptions. Some personalized insights and forecasts require an active PhaseDay PRO subscription or an in-app gift trial. Core onboarding and basic cycle views remain available without purchase. Terms of Use (EULA): https://oss.banan.xin/public_html/PhaseDay-terms-of-service.html Privacy Policy: https://oss.banan.xin/public_html/PhaseDay-privacy-policy.html