Hangover Predictor vs SleepCycle

Waking up feeling like death? Our AI-powered Hangover Predictor warns you before it’s too late. Test your limits, see how wrecked you’ll be tomorrow, and compete with friends to find out who’s the real heavyweight—or the ultimate lightweight How it works: 1. Real-time predictions: Know when you're nearing the danger zone as you drink. 2. Compete with friends: Challenge your crew to see who can handle their drinks and who taps out early. 3. Unlock the aftermath: Selfie proof required—post yours to check out how your friends fared last night. 4. Track your limits: Keep tabs on your drinking habits so you know when to call it before it’s too late. Disclaimer: Drink responsibly. You must be 21+ to use this app. We do not promote the consumption of alcohol Subscription Info: Access to app features requires a $2.99/month subscription. Terms of Use: https://hangover-predictor.netlify.app/terms

SleepCycle Calculator helps you find the ideal time to go to sleep or wake up — based on real sleep science. Built around the 90-minute sleep cycle model, the app calculates optimal bedtimes and wake-up windows so you always rise at the lightest stage of sleep, feeling alert and refreshed. WHETHER YOU SET A WAKE TIME OR SLEEP NOW • Wake-Up Mode: Enter your desired wake-up time and the app calculates 4–6 ideal bedtimes working backwards in 90-minute cycles, plus a 14-minute fall-asleep buffer. • Sleep Now Mode: Tap "Sleep Now" and the app instantly calculates your best wake-up times based on the current time. BUILT-IN SMART ALARM • Tap any suggested time to set it as your alarm instantly. • Choose from 6 soothing alarm sounds: Gentle Bells, Forest Birds, Ocean Waves, Digital Beep, Soft Chime, and Cosmic Hum. • Preview sounds before selecting. • Dismiss or snooze (9 minutes) when the alarm fires. • Push notifications ensure your alarm fires even when the app is in the background. SLEEP HISTORY & TRACKING • Every dismissed alarm automatically logs a sleep session — bedtime, wake time, duration, cycle count, and quality rating. • View your sleep history on an interactive calendar with color-coded indicators. • Track 7-day and 30-day sleep averages, your best night, and total nights logged. • Weekly bar chart shows sleep duration at a glance. SLEEP SCIENCE EDUCATION • Learn what a sleep cycle really is and why timing matters. • Explore the 4 sleep stages (N1, N2, N3, REM) with durations and biological functions. • Understand the 90-minute rule and the 14-minute sleep onset latency formula used by this app. • Science-backed sleep tips on room temperature, blue light, caffeine, and more. • 7 tappable references to peer-reviewed sources including the Sleep Foundation, NIH, and Harvard Health. BEAUTIFUL DESIGN • Deep indigo night-sky aesthetic inspired by Apple's bedtime design language. • Color-coded quality labels: Optimal, Great, Good, and Light for each sleep option. • Smooth animations, haptic feedback, and a breathing moon animation for a calming experience. SleepCycle Calculator is perfect for anyone who wants to stop waking up groggy and start waking up energized — backed by science, not guesswork. Note: A medical disclaimer is included in the app. This app is not intended to diagnose or treat sleep disorders. For serious sleep concerns, please consult a healthcare professional. PREMIUM ACCESS Try SleepCycle Pro free for 14 days. After the trial, unlock full lifetime access for a one-time purchase of $19.99 — no subscription, ever. Premium features include personalized sleep insights, full history tracking, and all future updates.