LunaDay

【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.