Time Transit
Beat Jet Lag, Scientifically.
Only for iPhone
Free · Designed for iPhone. Not verified for macOS.
iPhone
Time Transit turns the science of circadian biology into a simple daily protocol — so you arrive sharp, not struggling.
Most jet lag advice is generic. "Drink water. Avoid alcohol." Time Transit is different. It builds a precise, personalized adjustment plan based on your exact flight: departure city, arrival city, departure time, and the direction of your journey. Every action in your plan — from when to seek morning light to when to take a low-dose melatonin — is timed to your specific circadian window.
HOW IT WORKS
Time Transit models your circadian rhythm using the same principles chronobiologists use in clinical research. It calculates your optimal light exposure windows, caffeine timing, nap restrictions, and melatonin dose schedule based on your flight parameters.
Your protocol begins up to three days before departure and continues through your first days at your destination. Push notifications arrive exactly when each action is due — so you don't need to think. Just act.
YOUR DAILY PROTOCOL
• Light Exposure — Morning bright light is the most powerful time-cue in the human body. Time Transit tells you exactly when to go outside and for how long based on your current phase position.
• Caffeine Timing — Caffeine shifts your circadian clock depending on when you take it. Your plan specifies an optimal first-coffee window for each travel day.
• Melatonin Protocol — At low doses (0.3–0.5mg), melatonin is a circadian signal, not a sedative. Time Transit calculates the right dose window for your direction of travel.
• Sleep Scheduling — Your target sleep and wake times shift gradually before your trip and continue adjusting at your destination.
• Light Avoidance — Bright light at the wrong time can shift your clock in the wrong direction. Your plan tells you when to dim lights and step away from screens.
THE SCIENCE
Time Transit is built on published circadian research and phase-response curve modeling. The underlying methodology is used by professional sports teams, airline pilots, and clinical sleep medicine practitioners. This isn't a wellness app — it's a precision instrument.
DESIGNED FOR
Frequent business travelers who need to perform on arrival. Vacationers who refuse to lose days to grogginess. Athletes crossing time zones for competition. Anyone crossing 3 or more time zones.
PRIVACY
Time Transit operates entirely on-device. No account required. Your trip data, sleep schedule, and location information never leaves your phone.
Ratings & Reviews
What's New in 1.0.1
Flight Day View
Your travel day now has a dedicated experience. See your flight arc with departure and arrival times in their respective local times, a segmented timeline that switches between origin and destination timezones mid-flight, and a recommended in-flight sleep window when one applies to your route.
Notification Reliability Fix
Notifications now fire at the correct time even when your device timezone changes mid-trip. Previously, a notification scheduled before departure could shift by the full UTC offset difference after landing — this is now resolved.
Airport Coverage
Added Kona International Airport (KOA) on Hawaii's Big Island.
The developer, Ethan Macanas, 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 Not Collected
The developer does not collect any data from this app.
Accessibility
The developer has not yet indicated which accessibility features this app supports. Learn More
Information
- Seller
- Ethan Macanas
- Size
- 1.6 MB
- Category
- Travel
- Compatibility
Requires iOS 26.0 or later.
- iPhone
Requires iOS 26.0 or later. - Mac
Requires macOS 26.0 or later and a Mac with Apple M1 chip or later. - Apple Vision
Requires visionOS 26.0 or later.
- iPhone
- Languages
- English
- Age Rating
4+
- 4+
- Copyright
- © 2026 Time Transit. All rights reserved.