NightGuard: Sleep & Habits

v3.1.0 is here! Hybrid AI deep learning scoring engine + stunning Indigo&Purple redesign. New data source selector & weekly trends. All analysis on-device. Privacy first.

NightGuard is a professional AI-powered sleep health app that helps you deeply understand your sleep and scientifically improve your rest. By integrating Apple HealthKit and WeatherKit with on-device deep learning models, NightGuard delivers clinical-grade sleep analysis and personalized improvement plans.

Key Features:

• Hybrid AI Sleep Scoring: Combines a CoreML Transformer deep learning model with a lightweight neural network to generate precise sleep quality scores (0-100) across multiple dimensions including sleep stages, duration, and efficiency — all processed entirely on your device

• Comprehensive Health Tracking: DeepHealthKit integration for full physiological monitoring including heart rate, heart rate variability (HRV), blood oxygen saturation (SpO2), respiratory rate, and body temperature

• Smart Data Source Management: Choose which device's sleep data to analyze, ensuring your scores are based on the most accurate source

• Multi-Range Trend Analysis: Day, week, month, 6-month, and yearly views to visualize sleep patterns and long-term trends at a glance

• Environmental Impact Analysis: WeatherKit integration to quantify how temperature, humidity, and other environmental factors affect your sleep

• AI Personalized Insights: Dynamically adjusts scoring standards based on your age, gender, and historical data, delivering actionable sleep improvement recommendations

• Privacy-First Design: All AI inference runs locally on your device — your health data never leaves it. Secure iCloud (CloudKit) sync keeps your data consistent across all your devices

NightGuard — Your personal sleep scientist, guarding every night with AI.