LunaDay vs Hello Cycle

【Core Philosophy: Your Privacy is Sacred】 In an era of constant connectivity, LunaDay embraces the philosophy of "Digital Minimalism." We believe your cycle data is your most intimate secret. LunaDay is a back-to-basics period tracker that operates entirely offline—no data uploads, no tracking, just a completely private space for you. 【Why Choose LunaDay?】 Absolute Privacy (Pure Local Data) We have no backend servers and collect zero user data. All your records (cycles, symptoms, notes) are encrypted and stored locally on your device or your personal iCloud. Your data belongs to you, and only you. Ultra-Lightweight & Fast Launched in a blink. No bloatware, no social communities, and no irrelevant news feeds. We focus solely on the art of tracking, ensuring the app remains tiny and lightning-fast. Permanently Ad-Free We value your peace of mind. Whether you are a premium user or not, LunaDay’s interface remains clean and elegant. No pop-ups, no banners—just quiet companionship. Fair One-Time Purchase Say goodbye to endless subscriptions. We offer an affordable "Lifetime Membership" for the price of a single coffee. One payment to unlock everything forever and support independent development. 【Feature Highlights】 Minimalist Calendar View: An intuitive interface to see your cycle at a glance. Smart Prediction: Science-based algorithms to help you prepare for your next period. Gentle Reminders: Timely notifications that keep you informed without being intrusive. iCloud Sync: Securely backup and sync your data across your Apple devices. Simple, Pure, and Intuitive. Developer’s Promise: This app does not require internet permissions. All data is stored locally. Your life, your data, your LunaDay.

Understand your cycle with iPhone and Apple Watch. Hello Cycle helps you record periods and daily symptoms, follow your own patterns and prepare for your next period. • Estimates informed by your body: optionally connect Apple Health to use sleeping wrist temperature, resting heart rate, HRV and sleep summaries alongside cycle history. Calculations run on your iPhone. A compatible device, health permissions and enough data are required; timing and accuracy vary. • Simple records: start or end a period, correct past dates, and log flow, pain, mood, custom states and notes. See recorded periods, predicted periods and estimated ovulation in the calendar, and explore trends in Insights. • Apple Watch companion: record quickly, view cycle information in watch-face complications, and sync with your iPhone when the devices reconnect. • Privacy and control: Sign in with Apple before getting started. Privacy-filtered records sync automatically to your account; raw and daily health measurements are not uploaded. Export a PDF, set reminders, or delete your account in the app. Start with a free trial confirmed through Apple's purchase screen. After the trial, continued recording, predictions and insights require a one-time Lifetime VIP purchase. Existing records remain available to view, export and delete. Additional illustration series require Lifetime VIP. No subscription or automatic renewal. See the in-app Apple purchase screen for trial terms and local prices. For personal records and wellness reference only. Predictions are estimates, not guarantees. The app does not provide medical diagnoses, confirm ovulation, or support contraception or fertility decisions. Consult a qualified healthcare professional with health concerns.