LunaDay vs Sleep Again

【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.

You wake up at 3am. Or 4am. Or 5am. You know you should still be asleep. But your mind is already running. Replaying yesterday, rehearsing tomorrow. You lie there, watching the ceiling, hoping sleep will come back. Sometimes it does. Often it doesn't. This is terminal insomnia. Early morning awakening. It's the most common sleep problem for entrepreneurs and founders — and almost no app is built for it. Sleep Again is. — THE PROBLEM WITH EXISTING SLEEP APPS Most sleep apps track what already happened. They show you last night's score the morning after. By then, it's too late. You can't go back and fix Tuesday at 3am. Sleep Again works differently. It analyzes your HRV, heart rate, and sleep stage data from HealthKit and calculates your risk of an early morning wake-up before you go to sleep. You see your risk each evening — so you can act while there's still time. — HOW IT WORKS Sleep Again reads your health data from Apple Health each evening. It looks at: • Heart rate variability (HRV) — your body's real-time stress marker • Resting heart rate — elevated HR correlates with disrupted sleep • Sleep stage history — your recent deep sleep and REM patterns From these signals, it calculates your early wake-up risk for tonight. High cortisol days — heavy workouts, investor meetings, travel stress — show up in your HRV before you feel them at 3am. The prediction gives you a window to act: adjust your wind-down routine, skip the late workout, or simply know what's coming so you're not blindsided. — BUILT FOR ENTREPRENEURS Founders don't sleep poorly because of poor sleep hygiene. They sleep poorly because financial uncertainty, product stress, and the inability to mentally shut off keep cortisol elevated into the night. Sleep Again was built alongside the book "Sleep Again: Finding Rest in a World Built on Urgency" by Joakim Achrén — a founder who spent 15 years building VC-backed companies and sleeping terribly. The app applies the book's core insight: you can't fix a 3am wake-up at 3am. You have to act the evening before. — WHAT YOU GET • Evening risk score — your wake-up risk for tonight, calculated from real health data • Contributing factors — understand what's driving your risk (HRV drop, disruptions, overtraining) • Risk trends — see patterns across days and weeks • HealthKit integration — reads Apple Watch, Oura, WHOOP, and any HRV-capable device All features unlock with a 7-day free trial — no payment until trial ends. — FROM THE BOOK Readers of "Sleep Again" can unlock a 3-month pass using the QR code included in their ebook or audiobook bundle purchase. Tap "Redeem a pass" on the paywall to enter your code. — PRIVACY Sleep Again reads health data locally from HealthKit. Your data is not sent to external servers for processing. HRV and heart rate readings stay on your device. — SUBSCRIPTION Sleep Again Premium unlocks all features: • $9.99/year (save 58%) — 7-day free trial • $1.99/month — 7-day free trial • Cancel anytime. No payment due during trial. Payment is charged to your Apple ID after the 7-day trial. Subscriptions automatically renew unless cancelled at least 24 hours before the end of the current period. Manage or cancel in Settings → Apple ID → Subscriptions. Privacy Policy: https://sleepagain.co/privacy Terms of Use: https://sleepagain.co/terms