Sleep Cycle

Sleep Cycle revolutionizes nighttime recovery through intelligent sleep staging and bio-algorithm technology. This smart alarm clock tracks your movement and breathing to map sleep architecture, waking you during optimal light sleep phases. Beyond basic tracking, sleep cycle mod apk offers snore detection, heart rate variability insights, and personalized sleep quality scores through scientifically backed analysis.

Core Features

❤ Adaptive Wake Window - Detects 30-minute optimal awakening periods matching circadian rhythm

❤ Sleep Debt Calculator - Visualizes accumulated rest deficits across weeks

🌊 Acoustic Environment Grading - Rates noise pollution levels affecting deep sleep

🌊 Smartwatch Vibration Alerts - Silent haptic notifications for partners' snoring episodes

💤 Nap Energy Forecast - Predicts rejuvenation potential from daytime sleeps

💤 Sleep Sanctuary Mode - Automatically dims screens and pauses notifications pre-bedtime

Strengths

Clinically validated algorithm showing 87% accuracy vs polysomnography tests

Minimal battery drain compared to constant microphone monitoring apps

Customizable wind-down routines with breathwork exercises

GDPR-compliant local data processing ensures privacy

Limitations

- Full sleep oxygen reports require a premium subscription

- Toss-and-turn detection struggles with waterbed users

- Smart home integration limited to Philips Hue ecosystem

Developers

Created by Swedish biohacking experts Northcube AB, the team combines neuroscientists from Karolinska Institute with algorithm engineers specializing in circadian biology. Their 14-year research into sleep architecture informs continuous updates.

Market Comparison

┌ SleepScore (4.3★) - Uses sonar tech but requires bedside placement

├ Fitbit Sleep (4.5★) - Tracks SpO2 yet needs wearable purchase

└ AutoSleep (4.6★) - Apple Watch-centric with detailed HR analysis

Performance Metrics

Ranked #2 in Health & Fitness across 13 App Stores, maintaining a 4.8★ average from 610k reviews. Featured in 37 clinical sleep studies since 2020.

Latest Update (v6.3)

Added menstrual cycle sleep impact tracking and new "Sleep Banking" mode, allowing advanced rest accumulation before stressful events.