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  • LYS Track screenshot 1
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About LYS Track

Sleep soundly, boost your energy levels and improve your mood. LYS is your personal guide to a healthier life with light. • Learn how the light in your everyday life affects your wellbeing • Learn about your inner clock and follow science-based wellbeing programmes LIGHT, HEALTH AND WELLBEING Light has a powerful effect on your physical and mental health – influencing everything from how well you sleep to your focus at work. But in the modern world, 90% of our time is spent indoors. And most people struggle to get the light they need to maintain healthy sleep-wake cycles. Inspired by the latest research in sleep science, LYS helps you understand and find the right light for you. LYS is here to keep you happy, healthy and productive. ARE YOU A NIGHT OWL OR A MORNING LARK? The first step to healthy habits: know yourself. Use LYS to discover your chronotype. Learn about your inner clock and how to use light to your advantage Discover your optimal times for work, exercise, and sleep FOLLOW SCIENCE-BASED WELLBEING PROGRAMMES LYS Wellbeing Programmes nudge you towards small changes in your everyday life that can make a big difference to your sleep, mood and energy levels. In-depth analysis of your sleep-wake cycles and light intake Get detailed advice on how to improve your sleep and wellbeing Using your sleep data from the Health app, LYS will automatically adjust your schedule to match your actual wake and sleep cycle, for a perfect night sleep.

What’s new

Version 1.28 · Updated September 22, 2026

Thanks for using LYS! With this version we bring important fixes and updates to the app. If you have any feedback or comments, please let us know at [email protected]

App privacy

The developer, LYS Technologies LTD, reported these privacy practices to Apple.

Data Linked to You

The following data, which may be collected and linked to your identity, may be used for the following purposes:

  • Contact Info: Name, Email Address
  • Identifiers: User ID

Used for: Product Personalization, App Functionality

Data Not Linked to You

The following data, which may be collected but is not linked to your identity, may be used for the following purposes:

  • Usage Data: Product Interaction
  • Health & Fitness: Health
  • Location: Coarse Location
  • Diagnostics: Crash Data

Used for: Analytics, Product Personalization, App Functionality

Alternatives to LYS Track

Looking for apps like LYS Track? Here are 6 similar apps on the App Store. The highest rated is MyRestful: Circadian Lighting (5.0/5), and all 6 are free to download.

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