Sun Based Time vs SleepCycle

A clock and alarm app based on the sun, using the position of the sun where you are, with sleep scheduling in relation to sunrise and sunset. Sun Based Time gives you a grounded way to align with natural light. FEATURES ◆ Sun Based Clock - Countdown to Sunrise & Sunset Always know how long until sunrise or sunset. ◆ Visualize the Sun's Path Easily get a feel for which part of the day you are in. ◆ Set Alarms by the Sun Schedule alarms relative to sunrise, sunset, or solar noon. ◆ Wake Alarm by Sleep Duration Choose how long you want to sleep and dynamically wake after that long. ◆ Sleep Window by Sunset or Sunrise Set your sleep window in relation to sunset or sunrise. ◆ Custom Alarm Tones Choose from a curated set of calming default tones, or pick your own. Wake the way you want to wake. ◆ Calendar View A calendar grounded in the cyclical energies that shape the earth. With calendar integrations like Google Calendar. ◆ Privacy-Respecting Your data stays on your phone. Solar position based time is in tune with the rhythms you experience. Sun Based Time gives you a reference so you can increase your awareness of the relationships between cycles. ~~~~~~~~~~~~~~~~ From sunset, sunrise.

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.