Ultradia

Ultradia – Your energy rhythm tracker Discover your natural energy patterns and learn when you're at your best. Ultradia uses your Apple Watch data to detect your ultradian rhythms – the 90-120 minute cycles of high and low energy that occur throughout the day. By understanding your personal rhythm, you can schedule demanding tasks when your energy naturally peaks and take breaks when it dips. Track any activity Log workouts, focused work sessions, creative projects, or housework. Ultradia tracks how you feel during different activities and learns which times of day work best for each type. Features - Real-time energy state monitoring - Automatic HealthKit workout import - Activity logging for exercise, work, creative tasks, and housework - Energy window predictions - Personalised correlation insights - Sleep data integration - Push notifications for optimal windows - Companion Apple Watch app and widget Privacy first All data stays on your device. Ultradia uses Apple HealthKit to read your heart rate variability and activity data – nothing is uploaded or shared. The science Ultradian rhythms (specifically the Basic Rest-Activity Cycle) have been studied since the 1950s. Research shows these ~90-minute cycles affect alertness, cognitive performance, and physical readiness. By tracking the physiological markers of these cycles, Ultradia helps you work with your biology rather than against it. Requirements - Apple Watch required for rhythm detection - Best results after 3+ days of continuous wear Please note: Ultradia is a general wellness tool designed to help you understand your energy patterns. Predictions are estimates based on your data and may not always match how you feel. This app is not a medical device and is not intended to diagnose, treat, or prevent any health condition. Always listen to your body.