SleepTyme™ vs SleepRing

SleepTyme calculates the best time to wake up by timing your alarm to the end of a 90-minute sleep cycle — so you wake during light sleep instead of mid-cycle deep sleep. No more grogginess. No more sleep inertia. THE 90-MINUTE RULE Sleep moves through ~90-minute cycles: light → deep → REM → light. When your alarm interrupts deep sleep, you wake disoriented and tired for the next 30+ minutes. SleepTyme lines your wake time up with the END of a cycle — when you're naturally already in light sleep — so getting up feels effortless. NIGHT SLEEP CALCULATOR Enter a bedtime, get four ranked wake times: Optimal, Great, Good, Minimum. Each shows duration, cycle count, and a visual breakdown of deep / REM / light sleep phases. AGE-SPECIFIC SCIENCE • Adult (18+): 90-min cycles, 14-min sleep onset, 22% deep / 28% REM • Teen (13–17): 90-min cycles, 20-min onset (circadian delay), tuned for 8–10 hr sleep • Infant (0–12 mo): 50-min cycles, REM-dominant — parents use it to plan baby's wake time OPTIMAL NAP MODE Five science-backed nap durations: • Power Nap (20 min) — pure light sleep, zero grogginess, NASA's 34% alertness boost • Short Nap (30 min) — touches deep sleep for memory consolidation • Danger Zone (45 min) — WARNING, wakes you mid-deep-sleep • Full Cycle (90 min) — complete restoration • Recovery Nap (120 min) — sleep debt rescue SMART WAKE-UP ALARM Tap "Set Alarm" on any wake time. SleepTyme rings at the exact moment, even when your phone is locked or on silent. The chime starts soft and gradually fades to full volume over 30 seconds — designed to wake you gently, not jolt you upright. QUICK ALARM Need an alarm for a specific time, not a calculated wake? One tap, spin the wheel, done. SLEEP SOUNDS Drift off to calming ambient audio — Deep Night or Ocean Waves. Keeps playing while your phone is locked and hands over to your wake-up alarm in the morning. Free for everyone. PRIVACY-FIRST No accounts. No analytics. No third-party SDKs. No data leaves your device. FREE TO USE Night Sleep calculator with Adult mode is free forever. SLEEPTYME PRO — 7-DAY FREE TRIAL, THEN $3.99/YEAR • Smart wake-up alarm with gradual fade-in • Infant and Teen modes • Full Optimal Nap mode with alarm • Quick Alarm for any wake time Start with a 7-day free trial, then $3.99/year. Cancel anytime. No ads. Privacy Policy: https://sleeptyme.app/privacy.html Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Track your sleep with Apple Watch — no buttons, just sleep. SleepRing turns the data your Apple Watch records in the Health app into a clear, beautiful analysis of your night. Sleep wearing your Watch, wake up and see everything in easy-to-read rings. SLEEP RINGS • Night duration vs. your goal • Quality score (0–100) built from duration, efficiency, restorative sleep and awakenings • Deep sleep and efficiency at a glance NIGHT STAGES • Full timeline: deep, core, REM and awake • Duration and share of each stage • Bed and wake times, time awake and number of awakenings SLEEP VITALS • Average and minimum heart rate (BPM) • SpO2 (blood oxygen) • Heart rate variability (HRV) • Respiratory rate SLEEP BANK • Sleep credit or debt over the last 7 nights • Know how much sleep you "owe" and catch up FULL HISTORY • Chart of your last 30 nights • Every night listed with score and duration • Averages and records ON APPLE WATCH • Last night's summary on your wrist: ring, stages and efficiency AND MORE • Bedtime reminder • Customizable sleep goal (5h to 12h) • Dark mode through and through REAL PRIVACY Everything is processed on your device. SleepRing has no account, no ads and collects no data at all. Your health information stays in the Health app, under your control. REQUIREMENTS To record sleep automatically, wear an Apple Watch with sleep tracking enabled. SleepRing reads data from the Health app (read-only). SleepRing is for informational and wellness purposes; it is not a medical device.