PhaseShift: Jet Lag Planner
Sleep & Light Travel Schedule
Free · Designed for iPad. Not verified for macOS.
Prepare for your destination before takeoff. Get a personal schedule for light exposure, light avoidance, sleep, wake times, and reminders.
Arrive ready to enjoy your trip, not fight your body clock.
PhaseShift builds a personal jet lag adjustment schedule from your origin, destination, and travel dates. See when to seek or avoid bright light and when to sleep and wake, from the days before departure through your arrival.
KEY FEATURES
• Calculates your adjustment direction and estimated duration
• Combines pre-trip preparation and post-arrival guidance in one timeline
• Daily light exposure, light avoidance, bedtime, and wake-time recommendations
• Shows today's actions and overall adjustment progress
• Optional local reminders at scheduled times
• 12-hour and 24-hour time formats, light and dark appearance
• Available in English and Korean
• No account required; travel data stays on your device
Whether you are preparing for a business trip, a long-haul flight, or an international vacation, PhaseShift helps you start moving your sleep schedule toward local time.
PhaseShift does not measure body temperature or your circadian rhythm. Its schedule is an estimate based on general circadian adjustment rates and is not medical diagnosis or treatment advice.
Ratings & Reviews
- This app hasn’t received enough ratings or reviews to display an overview.
Improved the travel timeline and app stability.
The developer, DAEHONG MIN, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .
Data Linked to You
The following data may be collected and linked to your identity:
- Identifiers
- Usage Data
- Diagnostics
Data Not Linked to You
The following data may be collected but it is not linked to your identity:
- Location
- Diagnostics
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- DAEHONG MIN
- Size
- 16.3 MB
- Category
- Travel
- Compatibility
Requires iOS 17.0 or later.
- iPhone
Requires iOS 17.0 or later. - iPad
Requires iPadOS 17.0 or later. - Mac
Requires macOS 14.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 1.0 or later.
- iPhone
- Languages
- English and Korean
- Age Rating
9+
- 9+
- Contains
Advertising
Health or Wellness Topics
- Copyright
- © 2026 Jeremy Min